Upconversion luminescent materials: advances and applications.

[1]  Maxwell J. Crossley,et al.  Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion , 2012 .

[2]  Cunhai Dong,et al.  Cation exchange in lanthanide fluoride nanoparticles. , 2009, ACS nano.

[3]  M. Haase,et al.  Synthesis of Hexagonal Yb3+,Er3+‐Doped NaYF4 Nanocrystals at Low Temperature , 2009 .

[4]  Paras N. Prasad,et al.  Intense visible and near-infrared upconversion photoluminescence in colloidal LiYF₄:Er³+ nanocrystals under excitation at 1490 nm. , 2011, ACS nano.

[5]  Louis A. Cuccia,et al.  Controlled Synthesis and Water Dispersibility of Hexagonal Phase NaGdF4:Ho3+/Yb3+ Nanoparticles , 2009 .

[6]  Yuan Gao,et al.  Water-soluble NaYF4:Yb/Er upconversion nanophosphors: Synthesis, characteristics and application in bioimaging , 2010 .

[7]  Angelo Monguzzi,et al.  Upconversion-induced delayed fluorescence in multicomponent organic systems: Role of Dexter energy transfer , 2008 .

[8]  Shaomin Ji,et al.  Ruthenium(II) polyimine-coumarin dyad with non-emissive 3IL excited state as sensitizer for triplet-triplet annihilation based upconversion. , 2011, Angewandte Chemie.

[9]  Yun Sun,et al.  Dual-modality in vivo imaging using rare-earth nanocrystals with near-infrared to near-infrared (NIR-to-NIR) upconversion luminescence and magnetic resonance properties. , 2010, Biomaterials.

[10]  Ping Huang,et al.  Nd3+-sensitized upconversion white light emission of Tm3+/Ho3+ bridged by Yb3+ in β-YF3 nanocrystals embedded transparent glass ceramics , 2010 .

[11]  Jianhua Hao,et al.  Bi-functional NaLuF4:Gd3+/Yb3+/Tm3+ nanocrystals: structure controlled synthesis, near-infrared upconversion emission and tunable magnetic properties , 2012 .

[12]  Ru‐Shi Liu,et al.  The effect of surface coating on energy migration-mediated upconversion. , 2012, Journal of the American Chemical Society.

[13]  C. Geraldes,et al.  (Gd,Yb,Tb)PO4 up-conversion nanocrystals for bimodal luminescence-MR imaging. , 2012, Nanoscale.

[14]  Yun Sun,et al.  Core-shell lanthanide upconversion nanophosphors as four-modal probes for tumor angiogenesis imaging. , 2013, ACS nano.

[15]  N. Yao,et al.  Phase transition induced formation of hollow structures in colloidal lanthanide-doped NaYF4 nanocrystals , 2010 .

[16]  Angelo Monguzzi,et al.  Multicomponent polymeric film for red to green low power sensitized up-conversion. , 2009, The journal of physical chemistry. A.

[17]  K. Schanze,et al.  Near-IR phosphorescent metalloporphyrin as a photochemical upconversion sensitizer. , 2013, Chemical communications.

[18]  A. Kawai,et al.  Kinetics of photon upconversion in ionic liquids: time-resolved analysis of delayed fluorescence. , 2013, The journal of physical chemistry. B.

[19]  D. Zhao,et al.  One-step hydrothermal synthesis of carboxyl-functionalized upconversion phosphors for bioapplications. , 2012, Chemistry.

[20]  Maxwell J. Crossley,et al.  Kinetic Analysis of Photochemical Upconversion by Triplet−Triplet Annihilation: Beyond Any Spin Statistical Limit , 2010 .

[21]  J. Méndez‐Ramos,et al.  Novel Sol–Gel Nano‐Glass–Ceramics Comprising Ln3+‐Doped YF3 Nanocrystals: Structure and High Efficient UV Up‐Conversion , 2011 .

[22]  P. E. Keivanidis,et al.  Upconversion photoluminescence in poly(ladder-type-pentaphenylene) doped with metal (II)-octaethyl porphyrins , 2005 .

[23]  Shuo Tan,et al.  Lanthanide-doped ultrasmall yttrium fluoride nanoparticles with enhanced multicolor upconversion photoluminescence , 2012 .

[24]  Zhigang Chen,et al.  Facile Epoxidation Strategy for Producing Amphiphilic Up-Converting Rare-Earth Nanophosphors as Biological Labels , 2008 .

[25]  Jae-Hong Kim,et al.  High Efficiency Low-Power Upconverting Soft Materials , 2012 .

[26]  Hong Zhang,et al.  Ionothermal synthesis of hexagonal-phase NaYF(4):Yb(3+),Er(3+)/Tm(3+) upconversion nanophosphors. , 2009, Chemical communications.

[27]  C. Weder,et al.  Low-power photon upconversion through triplet–triplet annihilation in polymers , 2012 .

[28]  M. F. Paige,et al.  Efficiency of noncoherent photon upconversion by triplet-triplet annihilation: the C60 plus anthanthrene system and the importance of tuning the triplet energies. , 2013, The journal of physical chemistry. A.

[29]  Chun-Hua Yan,et al.  Bioimaging and toxicity assessments of near-infrared upconversion luminescent NaYF4:Yb,Tm nanocrystals. , 2011, Biomaterials.

[30]  E. Wang,et al.  Multifunctional polyoxometalates-modified upconversion nanoparticles: integration of electrochromic devices and antioxidants detection. , 2013, Chemical communications.

[31]  Xiaogang Liu,et al.  Upconversion multicolor fine-tuning: visible to near-infrared emission from lanthanide-doped NaYF4 nanoparticles. , 2008, Journal of the American Chemical Society.

[32]  Nora Khanarian,et al.  In vivo and scanning electron microscopy imaging of up-converting nanophosphors in Caenorhabditis elegans. , 2006, Nano letters.

[33]  S. Baluschev,et al.  Annihilation assisted upconversion: all-organic, flexible and transparent multicolour display , 2008 .

[34]  Tero Soukka,et al.  Upconverting phosphors in a dual-parameter LRET-based hybridization assay. , 2009, The Analyst.

[35]  Yu Huang,et al.  Plasmonic modulation of the upconversion fluorescence in NaYF4 :Yb/Tm hexaplate nanocrystals using gold nanoparticles or nanoshells. , 2010, Angewandte Chemie.

[36]  Marco Pedroni,et al.  NIR-to-NIR two-photon excited CaF2:Tm3+,Yb3+ nanoparticles: multifunctional nanoprobes for highly penetrating fluorescence bio-imaging. , 2011, ACS nano.

[37]  Shanshan Huang,et al.  Rare Earth Fluorides Nanowires/Nanorods Derived from Hydroxides: Hydrothermal Synthesis and Luminescence Properties , 2009 .

[38]  Jie Shen,et al.  Lanthanide-doped upconverting luminescent nanoparticle platforms for optical imaging-guided drug delivery and therapy. , 2013, Advanced drug delivery reviews.

[39]  Dongmei Wu,et al.  Core-shell NaYF4:Yb3+,Tm3+@FexOy nanocrystals for dual-modality T2-enhanced magnetic resonance and NIR-to-NIR upconversion luminescent imaging of small-animal lymphatic node. , 2011, Biomaterials.

[40]  B. Tomanek,et al.  Cation Exchange: A Facile Method To Make NaYF4:Yb,Tm-NaGdF4 Core–Shell Nanoparticles with a Thin, Tunable, and Uniform Shell , 2012 .

[41]  Qingfeng Xiao,et al.  Dual-targeting upconversion nanoprobes across the blood-brain barrier for magnetic resonance/fluorescence imaging of intracranial glioblastoma. , 2014, ACS nano.

[42]  Jun Lin,et al.  Preparation and Characterization of Upconversion Luminescent NaYF4:Yb3+, Er3+(Tm3+)/PMMA Bulk Transparent Nanocomposites Through In Situ Photopolymerization , 2010 .

[43]  Lianzhou Wang,et al.  Positive and Negative Lattice Shielding Effects Co‐existing in Gd (III) Ion Doped Bifunctional Upconversion Nanoprobes , 2011 .

[44]  Liancheng Zhao,et al.  Preparation and characterization of upconversion luminescent LaF3:Yb3+,Er3+/LaF3 core/shell nanocrystals , 2011 .

[45]  Maxwell J. Crossley,et al.  Efficiency Enhancement of Organic and Thin-Film Silicon Solar Cells with Photochemical Upconversion , 2012 .

[46]  Synthesis of Spherical Down‐ and Up‐Conversion NaYF4‐Based Nanophosphors with Tunable Size in Ethylene Glycol without Surfactants or Capping Additives , 2008 .

[47]  O. Wolfbeis,et al.  DNA “Nanolamps”: “Clicked” DNA Conjugates with Photon Upconverting Nanoparticles as Highly Emissive Biomaterial , 2012 .

[48]  Kian Meng Lim,et al.  NIR-to-visible upconversion nanoparticles for fluorescent labeling and targeted delivery of siRNA , 2009, Nanotechnology.

[49]  Yu Huang,et al.  Composition tuning the upconversion emission in NaYF4:Yb/Tm hexaplate nanocrystals. , 2011, Nanoscale.

[50]  Xiaogang Qu,et al.  Long-circulating Gd(2)O(3):Yb(3+), Er(3+) up-conversion nanoprobes as high-performance contrast agents for multi-modality imaging. , 2013, Biomaterials.

[51]  Jianzhang Zhao,et al.  Room-temperature long-lived triplet excited states of naphthalenediimides and their applications as organic triplet photosensitizers for photooxidation and triplet-triplet annihilation upconversions. , 2012, The Journal of organic chemistry.

[52]  Chun-Hua Yan,et al.  Ag nanowires enhanced upconversion emission of NaYF4:Yb,Er nanocrystals via a direct assembly method. , 2009, Chemical communications.

[53]  X. Tao,et al.  Efficient Triplet Sensitizers of Palladium(II) Tetraphenylporphyrins for Upconversion-powered Photoelectrochemistry , 2014 .

[54]  Jing Chen,et al.  Controllable synthesis of NaYF(4) : Yb,Er upconversion nanophosphors and their application to in vivo imaging of Caenorhabditis elegans. , 2011, Journal of materials chemistry.

[55]  Cunhai Dong,et al.  Self-focusing by Ostwald ripening: a strategy for layer-by-layer epitaxial growth on upconverting nanocrystals. , 2012, Journal of the American Chemical Society.

[56]  Markus P. Hehlen,et al.  Hexagonal Sodium Yttrium Fluoride Based Green and Blue Emitting Upconversion Phosphors , 2004 .

[57]  Qing Peng,et al.  Fluorescence resonant energy transfer biosensor based on upconversion-luminescent nanoparticles. , 2005, Angewandte Chemie.

[58]  Shaomin Ji,et al.  Rhenium(I) tricarbonyl polypyridine complexes showing strong absorption of visible light and long-lived triplet excited states as a triplet photosensitizer for triplet-triplet annihilation upconversion. , 2012, Dalton transactions.

[59]  T. Möller,et al.  Green-emitting CePO4:Tb/LaPO4 core-shell nanoparticles with 70% photoluminescence quantum yield. , 2003, Angewandte Chemie.

[60]  Wei Feng,et al.  Recent advances in the optimization and functionalization of upconversion nanomaterials for in vivo bioapplications , 2013 .

[61]  Zhiqiang Gao,et al.  Strong Red-Emitting near-Infrared-to-Visible Upconversion Fluorescent Nanoparticles , 2011 .

[62]  Fuyou Li,et al.  A versatile fabrication of upconversion nanophosphors with functional-surface tunable ligands , 2010 .

[63]  Ya-Wen Zhang,et al.  Single-crystalline and monodisperse LaF3 triangular nanoplates from a single-source precursor. , 2005, Journal of the American Chemical Society.

[64]  D. Zhao,et al.  Successive Layer-by-Layer Strategy for Multi-Shell Epitaxial Growth: Shell Thickness and Doping Position Dependence in Upconverting Optical Properties , 2013 .

[65]  S. Feng,et al.  Hydrophilic, upconverting, multicolor, lanthanide-doped NaGdF4 nanocrystals as potential multifunctional bioprobes. , 2012, Chemistry.

[66]  H. Ågren,et al.  Intense ultraviolet upconversion emission from water-dispersed colloidal YF3:Yb3+/Tm3+ rhombic nanodisks. , 2014, Nanoscale.

[67]  R. A. Henry,et al.  Fluorescence spectra and quantum yields. Quinine, uranine, 9,10-diphenylanthracene, and 9,10-bis(phenylethynyl)anthracenes , 1974 .

[68]  Justin Jang Hann Chu,et al.  Photodynamic inactivation of viruses using upconversion nanoparticles. , 2012, Biomaterials.

[69]  D. Hertel,et al.  Triplet-triplet annihilation in a poly(fluorene)-derivative , 2001 .

[70]  Zhengquan Li,et al.  Tracking transplanted cells in live animal using upconversion fluorescent nanoparticles. , 2009, Biomaterials.

[71]  A. Speghini,et al.  Structural and optical investigation of colloidal Ln3+/Yb3+ co-doped KY3F10 nanocrystals , 2009 .

[72]  Jianhua Hao,et al.  PEG modified BaGdF₅:Yb/Er nanoprobes for multi-modal upconversion fluorescent, in vivo X-ray computed tomography and biomagnetic imaging. , 2012, Biomaterials.

[73]  Hailong Qiu,et al.  Ethylenediaminetetraacetic acid (EDTA)-controlled synthesis of multicolor lanthanide doped BaYF5 upconversion nanocrystals , 2011 .

[74]  H. Güdel,et al.  Chemical Modification of Transition Metal Upconversion Properties: Exchange Enhancement of Ni2+ Upconversion Rates in Ni2+:RbMnCl3 , 2000 .

[75]  Ya-Wen Zhang,et al.  High-quality sodium rare-earth fluoride nanocrystals: controlled synthesis and optical properties. , 2006, Journal of the American Chemical Society.

[76]  Jun Lin,et al.  Up-conversion cell imaging and pH-induced thermally controlled drug release from NaYF4/Yb3+/Er3+@hydrogel core-shell hybrid microspheres. , 2012, ACS nano.

[77]  G. Chow,et al.  Synthesis of Hexagonal‐Phase NaYF4:Yb,Er and NaYF4:Yb,Tm Nanocrystals with Efficient Up‐Conversion Fluorescence , 2006 .

[78]  Gan-Moog Chow,et al.  Effects of size and surface on luminescence properties of submicron upconversion NaYF_4:Yb,Er particles , 2009 .

[79]  Chunhua Yan,et al.  Triple-functional core-shell structured upconversion luminescent nanoparticles covalently grafted with photosensitizer for luminescent, magnetic resonance imaging and photodynamic therapy in vitro. , 2012, Nanoscale.

[80]  Yadong Li,et al.  Monodispersed Nanocrystalline Fluoroperovskite Up-Conversion Phosphors , 2007 .

[81]  Xun Wang,et al.  Hydrothermal synthesis of rare-earth fluoride nanocrystals. , 2006, Inorganic chemistry.

[82]  Jun Lin,et al.  Monodisperse bifunctional Fe3O4@NaGdF4:Yb/Er@NaGdF4:Yb/Er core–shell nanoparticles , 2012 .

[83]  Shouzhuo Yao,et al.  Fluorescence resonance energy transfer aptasensor for platelet-derived growth factor detection based on upconversion nanoparticles in 30% blood serum , 2013 .

[84]  Photo-induced energy transfer in ruthenium-centred polymers prepared by a RAFT approach , 2013 .

[85]  Ralph Weissleder,et al.  Upconverting Organic Dye Doped Core-Shell Nano-Composites for Dual-Modality NIR Imaging and Photo-Thermal Therapy , 2013, Theranostics.

[86]  Yun Sun,et al.  Fluorine-18-labeled Gd3+/Yb3+/Er3+ co-doped NaYF4 nanophosphors for multimodality PET/MR/UCL imaging. , 2011, Biomaterials.

[87]  S. Rogelj,et al.  Design of a highly sensitive and specific nucleotide sensor based on photon upconverting particles. , 2006, Journal of the American Chemical Society.

[88]  J. M. Kikkawa,et al.  A generalized ligand-exchange strategy enabling sequential surface functionalization of colloidal nanocrystals. , 2011, Journal of the American Chemical Society.

[89]  Frank C J M van Veggel,et al.  Surface modification of upconverting NaYF4 nanoparticles with PEG-phosphate ligands for NIR (800 nm) biolabeling within the biological window. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[90]  Guanying Chen,et al.  Ultrasmall monodisperse NaYF(4):Yb(3+)/Tm(3+) nanocrystals with enhanced near-infrared to near-infrared upconversion photoluminescence. , 2010, ACS nano.

[91]  E. Reichmanis,et al.  Low-threshold photon upconversion capsules obtained by photoinduced interfacial polymerization. , 2012, Angewandte Chemie.

[92]  Zhuang Liu,et al.  Upconversion nanophosphors for small-animal imaging. , 2012, Chemical Society reviews.

[93]  Maxwell J. Crossley,et al.  Micro-optical design of photochemical upconverters for thin-film solar cells , 2013 .

[94]  F. Castellano,et al.  Triplet Sensitized Red-to-Blue Photon Upconversion , 2010 .

[95]  Zhigang Chen,et al.  Laser scanning up-conversion luminescence microscopy for imaging cells labeled with rare-earth nanophosphors. , 2009, Analytical chemistry.

[96]  S. Gambhir,et al.  Quantum Dots for Live Cells, in Vivo Imaging, and Diagnostics , 2005, Science.

[97]  Jianzhang Zhao,et al.  Hetero Bodipy-dimers as heavy atom-free triplet photosensitizers showing a long-lived triplet excited state for triplet-triplet annihilation upconversion. , 2013, Chemical communications.

[98]  Nobuhiro Yanai,et al.  Photon upconverting liquids: matrix-free molecular upconversion systems functioning in air. , 2013, Journal of the American Chemical Society.

[99]  Wei Hou,et al.  One-step synthesis and characterization of water-soluble NaYF4:Yb,Er/Polymer nanoparticles with efficient up-conversion fluorescence , 2009 .

[100]  Anping Yang,et al.  Intrinsic single-band upconversion emission in colloidal Yb/Er(Tm):Na3Zr(Hf)F7 nanocrystals. , 2012, Chemical communications.

[101]  Shaomin Ji,et al.  Triplet–triplet annihilation based upconversion: from triplet sensitizers and triplet acceptors to upconversion quantum yields , 2011 .

[102]  John-Christopher Boyer,et al.  Near-infrared light-triggered dissociation of block copolymer micelles using upconverting nanoparticles. , 2011, Journal of the American Chemical Society.

[103]  A. Hauser,et al.  Near-infrared→visible light upconversion in a molecular trinuclear d-f-d complex. , 2011, Angewandte Chemie.

[104]  Peng Zhang,et al.  Enhancing multiphoton upconversion through energy clustering at sublattice level. , 2014, Nature materials.

[105]  F. Auzel,et al.  Materials and devices using double-pumped-phosphors with energy transfer , 1973 .

[106]  R. Tubino,et al.  Effect of an external magnetic field on the up-conversion photoluminescence of organic films: the role of disorder in triplet-triplet annihilation. , 2009, Physical review letters.

[107]  F. Ortica,et al.  A triplet—triplet annihilation based up-conversion process investigated in homogeneous solutions and oil-in-water microemulsions of a surfactant , 2013, Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology.

[108]  John-Christopher Boyer,et al.  Synthesis of colloidal upconverting NaYF4: Er3+/Yb3+ and Tm3+/Yb3+ monodisperse nanocrystals. , 2006, Nano letters.

[109]  Chunhua Lu,et al.  Different upconversion properties of β-NaYF4:Yb3+,Tm3+/Er3+ in affecting the near-infrared-driven photocatalytic activity of high-reactive TiO2. , 2014, ACS applied materials & interfaces.

[110]  Wei Feng,et al.  Luminescent chemodosimeters for bioimaging. , 2013, Chemical reviews.

[111]  J. Hao,et al.  A strategy for simultaneously realizing the cubic-to-hexagonal phase transition and controlling the small size of NaYF4:Yb3+,Er3+ nanocrystals for in vitro cell imaging. , 2012, Small.

[112]  Hong Zhang,et al.  Covalently assembled NIR nanoplatform for simultaneous fluorescence imaging and photodynamic therapy of cancer cells. , 2012, ACS nano.

[113]  Wei Feng,et al.  Blue-emissive upconversion nanoparticles for low-power-excited bioimaging in vivo. , 2012, Journal of the American Chemical Society.

[114]  Stefan Andersson-Engels,et al.  Fluorescence diffuse optical tomography using upconverting nanoparticles , 2009 .

[115]  Chao Wang,et al.  Single-band upconversion emission in lanthanide-doped KMnF3 nanocrystals. , 2011, Angewandte Chemie.

[116]  Leilei Yin,et al.  Biomimetic surface engineering of lanthanide-doped upconversion nanoparticles as versatile bioprobes. , 2012, Angewandte Chemie.

[117]  Shuk Han Cheng,et al.  Polymer-coated NaYF₄:Yb³⁺, Er³⁺ upconversion nanoparticles for charge-dependent cellular imaging. , 2011, ACS nano.

[118]  Manoj Kumar,et al.  Versatile photosensitizers for photodynamic therapy at infrared excitation. , 2007, Journal of the American Chemical Society.

[119]  Wei Feng,et al.  The biosafety of lanthanide upconversion nanomaterials. , 2015, Chemical Society reviews.

[120]  Enzo Terreno,et al.  Pushing the sensitivity envelope of lanthanide-based magnetic resonance imaging (MRI) contrast agents for molecular imaging applications. , 2009, Accounts of chemical research.

[121]  E. Rosa,et al.  Role of Yb3+ and Er3+ concentration on the tunability of green-yellow-red upconversion emission of codoped ZrO2:Yb3+–Er3+ nanocrystals , 2010 .

[122]  Y. Liu,et al.  Hydrothermal synthesis of NaLuF4:153Sm,Yb,Tm nanoparticles and their application in dual-modality upconversion luminescence and SPECT bioimaging. , 2013, Biomaterials.

[123]  P. Chu,et al.  Quasi-seeded growth, phase transformation, and size tuning of multifunctional hexagonal NaLnF4 (Ln = Y, Gd, Yb) nanocrystalsvia in situ cation-exchange reaction , 2012 .

[124]  S. Bonnet,et al.  Activation of a photodissociative ruthenium complex by triplet-triplet annihilation upconversion in liposomes. , 2014, Angewandte Chemie.

[125]  Oliver Benson,et al.  Observation of size dependence in multicolor upconversion in single Yb3+, Er3+ Codoped NaYF4 nanocrystals. , 2009, Nano letters.

[126]  Qingyu Zhang,et al.  Rate equation model analysis on the infrared and upconversion emission of Er/Yb co-doped borate-silicate glass , 2010 .

[127]  Shaomin Ji,et al.  Ruthenium(II)-polyimine-coumarin light-harvesting molecular arrays: design rationale and application for triplet-triplet-annihilation-based upconversion. , 2012, Chemistry.

[128]  Shaomin Ji,et al.  Organic triplet sensitizer library derived from a single chromophore (BODIPY) with long-lived triplet excited state for triplet-triplet annihilation based upconversion. , 2011, The Journal of organic chemistry.

[129]  Jane P. Chang,et al.  Luminescence of Nanocrystalline Erbium‐Doped Yttria , 2009 .

[130]  F. Castellano,et al.  Photochemical upconversion: anthracene dimerization sensitized to visible light by a RuII chromophore. , 2006, Angewandte Chemie.

[131]  Francisco Sanz-Rodríguez,et al.  Intracellular imaging of HeLa cells by non-functionalized NaYF4 : Er3+, Yb3+ upconverting nanoparticles. , 2010, Nanoscale.

[132]  J. Bünzli,et al.  Taking advantage of luminescent lanthanide ions. , 2005, Chemical Society reviews.

[133]  Tao Zhang,et al.  Ytterbium stabilized ordered mesoporous titania for near-infrared photocatalysis. , 2011, Chemical communications.

[134]  Jun Lin,et al.  A facile fabrication of upconversion luminescent and mesoporous core-shell structured β-NaYF4:Yb3+, Er3+@mSiO2 nanocomposite spheres for anti-cancer drug delivery and cell imaging. , 2013, Biomaterials science.

[135]  Felix N. Castellano,et al.  Photon upconversion based on sensitized triplet-triplet annihilation , 2010 .

[136]  Hui Guo,et al.  Mesoporous-silica-coated up-conversion fluorescent nanoparticles for photodynamic therapy. , 2009, Small.

[137]  Ya-Wen Zhang,et al.  Rare-earth oxide nanopolyhedra, nanoplates, and nanodisks. , 2005, Angewandte Chemie.

[138]  Yong Zhang,et al.  Small upconverting fluorescent nanoparticles for biomedical applications. , 2010, Small.

[139]  Zhihong Liu,et al.  An effective approach to enhanced energy-transfer efficiency from up-converting phosphors and increased assay sensitivity. , 2012, Chemical communications.

[140]  P. Choyke,et al.  In vivo multiple color lymphatic imaging using upconverting nanocrystals , 2009 .

[141]  Xiaohong Sun,et al.  Fabrication of Ag@SiO(2)@Y(2)O(3):Er nanostructures for bioimaging: tuning of the upconversion fluorescence with silver nanoparticles. , 2010, Journal of the American Chemical Society.

[142]  D. Astruc,et al.  Applications of vectorized gold nanoparticles to the diagnosis and therapy of cancer. , 2012, Chemical Society reviews.

[143]  Tao Yi,et al.  Up-conversion luminescent switch based on photochromic diarylethene and rare-earth nanophosphors. , 2008, Chemical communications.

[144]  Jianzhang Zhao,et al.  Visible light-absorbing rhenium(I) tricarbonyl complexes as triplet photosensitizers in photooxidation and triplet-triplet annihilation upconversion. , 2013, Dalton transactions.

[145]  C. Weder,et al.  Influence of temperature on low-power upconversion in rubbery polymer blends. , 2009, Journal of the American Chemical Society.

[146]  T. Nann,et al.  Monodisperse upconverting nanocrystals by microwave-assisted synthesis. , 2009, ACS nano.

[147]  Qiang Sun,et al.  Mechanistic investigation of photon upconversion in Nd(3+)-sensitized core-shell nanoparticles. , 2013, Journal of the American Chemical Society.

[148]  R. Scheps.  Upconversion laser processes , 1996 .

[149]  H. Too,et al.  Gold decorated NaYF4:Yb,Er/NaYF4/silica (core/shell/shell) upconversion nanoparticles for photothermal destruction of BE(2)-C neuroblastoma cells , 2011 .

[150]  Qi Zhao,et al.  Synthesis of stable carboxy-terminated NaYF4: Yb3+, Er3+@SiO2 nanoparticles with ultrathin shell for biolabeling applications. , 2013, Nanoscale.

[151]  Marc Vendrell,et al.  Intracellular glutathione detection using MnO(2)-nanosheet-modified upconversion nanoparticles. , 2011, Journal of the American Chemical Society.

[152]  F. Huang,et al.  Lanthanide dopant-induced formation of uniform sub-10 nm active-core/active-shell nanocrystals with near-infrared to near-infrared dual-modal luminescence , 2012 .

[153]  Wei Fan,et al.  Engineering the Upconversion Nanoparticle Excitation Wavelength: Cascade Sensitization of Tri‐doped Upconversion Colloidal Nanoparticles at 800 nm , 2013 .

[154]  Markus Pollnau,et al.  Temporal dynamics of upconversion luminescence in Er3+, Yb3+ co-doped crystalline KY(WO4)2 thin films , 2008 .

[155]  Chenglin Yan,et al.  Near-IR photoresponse in new up-converting CdSe/NaYF4:Yb,Er nanoheterostructures. , 2010, Journal of the American Chemical Society.

[156]  A. Speghini,et al.  Cross-Relaxation and Upconversion Processes in Pr3+ Singly Doped and Pr3+/Yb3+ Codoped Nanocrystalline Gd3Ga5O12: The Sensitizer/Activator Relationship , 2008 .

[157]  J. Gore,et al.  Synthesis of brightly PEGylated luminescent magnetic upconversion nanophosphors for deep tissue and dual MRI imaging. , 2014, Small.

[158]  Jianhua Hao,et al.  Tunable multicolor upconversion emissions and paramagnetic property of monodispersed bifunctional lanthanide-doped NaGdF4 nanorods , 2011 .

[159]  Jianzhang Zhao,et al.  Tuning the photophysical properties of N^NPt(II) bisacetylide complexes with fluorene moiety and its applications for triplet–triplet-annihilation based upconversion , 2012 .

[160]  Yong Zhang,et al.  Biocompatibility of silica coated NaYF(4) upconversion fluorescent nanocrystals. , 2008, Biomaterials.

[161]  Chunhua Yan,et al.  Optically active uniform potassium and lithium rare earth fluoride nanocrystals derived from metal trifluroacetate precursors. , 2009, Dalton transactions.

[162]  Qingqing Dou,et al.  Sandwich-structured upconversion nanoparticles with tunable color for multiplexed cell labeling. , 2013, Biomaterials.

[163]  Ning Liu,et al.  Highly plasmon-enhanced upconversion emissions from Au@β-NaYF4:Yb,Tm hybrid nanostructures. , 2011, Chemical communications.

[164]  Wei Feng,et al.  Sub-10 nm hexagonal lanthanide-doped NaLuF4 upconversion nanocrystals for sensitive bioimaging in vivo. , 2011, Journal of the American Chemical Society.

[165]  D. Zhao,et al.  Synthesis of uniform rare earth fluoride (NaMF4) nanotubes by in situ ion exchange from their hydroxide [M(OH)3] parents. , 2009, ACS nano.

[166]  Jianhua Hao,et al.  Simultaneous synthesis and functionalization of water-soluble up-conversion nanoparticles for in-vitro cell and nude mouse imaging. , 2011, Nanoscale.

[167]  Peng Zhang,et al.  High Upconversion Efficiency from Hetero Triplet–Triplet Annihilation in Multiacceptor Systems , 2013 .

[168]  Yang Yang,et al.  High-quality water-soluble and surface-functionalized upconversion nanocrystals as luminescent probes for bioimaging. , 2011, Biomaterials.

[169]  F. Vetrone,et al.  Sensitized Ce(3+) and Gd(3+) ultraviolet emissions by Tm(3+) in colloidal LiYF(4) nanocrystals. , 2009, Chemistry.

[170]  Wei Feng,et al.  Core-shell Fe3O4@NaLuF4:Yb,Er/Tm nanostructure for MRI, CT and upconversion luminescence tri-modality imaging. , 2012, Biomaterials.

[171]  Ya‐Wen Zhang,et al.  Controlled-Synthesis, Self-Assembly Behavior, and Surface-Dependent Optical Properties of High-Quality Rare-Earth Oxide Nanocrystals , 2007 .

[172]  Liyi Shi,et al.  Cysteine modified rare-earth up-converting nanoparticles for in vitro and in vivo bioimaging. , 2014, Biomaterials.

[173]  J. M. Gardner,et al.  Photon Upconversion on Dye-Sensitized Nanostructured ZrO2 Films , 2011 .

[174]  W. Qin,et al.  Effect of OH− on the upconversion luminescent efficiency of Y2O3:Yb3+, Er3+ nanostructures , 2006 .

[175]  I. Klimant,et al.  Synthesis and properties of new phosphorescent red light-excitable platinum(II) and palladium(II) complexes with Schiff bases for oxygen sensing and triplet-triplet annihilation-based upconversion. , 2013, Inorganic chemistry.

[176]  Tymish Y. Ohulchanskyy,et al.  High contrast in vitro and in vivo photoluminescence bioimaging using near infrared to near infrared up-conversion in Tm3+ and Yb3+ doped fluoride nanophosphors. , 2008, Nano letters.

[177]  Jianzhang Zhao,et al.  Using C60-bodipy dyads that show strong absorption of visible light and long-lived triplet excited states as organic triplet photosensitizers for triplet–triplet annihilation upconversion , 2012 .

[178]  Liang Yan,et al.  Mn2+ Dopant‐Controlled Synthesis of NaYF4:Yb/Er Upconversion Nanoparticles for in vivo Imaging and Drug Delivery , 2012, Advanced materials.

[179]  Greg J. Stanisz,et al.  Size-Tunable, Ultrasmall NaGdF4 Nanoparticles: Insights into Their T1 MRI Contrast Enhancement , 2011 .

[180]  Chenghui Liu,et al.  Monodisperse, size-tunable and highly efficient β-NaYF4:Yb,Er(Tm) up-conversion luminescent nanospheres: controllable synthesis and their surface modifications , 2009 .

[181]  M. Samoć,et al.  Giant enhancement of upconversion in ultra-small Er3+/Yb3+:NaYF4 nanoparticles via laser annealing , 2012, Nanotechnology.

[182]  A. McDonagh,et al.  Fingermark detection on non-porous and semi-porous surfaces using NaYF4:Er,Yb up-converter particles. , 2011, Forensic science international.

[183]  Paras N Prasad,et al.  Color-coded multilayer photopatterned microstructures using lanthanide (III) ion co-doped NaYF4 nanoparticles with upconversion luminescence for possible applications in security , 2009, Nanotechnology.

[184]  W.G.J.H.M. van Sark,et al.  Upconverter solar cells: materials and applications , 2011 .

[185]  M. Haase,et al.  Blue, green, and red upconversion emission from lanthanide-doped LuPO4 and YbPO4 nanocrystals in a transparent colloidal solution. , 2003, Angewandte Chemie.

[186]  Meng Earn Lim,et al.  Applications of upconversion nanoparticles in imaging, detection and therapy. , 2011, Nanomedicine.

[187]  Yanqing Hua,et al.  Multifunctional nanoprobes for upconversion fluorescence, MR and CT trimodal imaging. , 2012, Biomaterials.

[188]  E. Rosa,et al.  Enhancement of Upconversion Emission of LaPO4:Er@Yb Core−Shell Nanoparticles/Nanorods , 2008 .

[189]  Christopher McRae,et al.  Upconversion luminescence with tunable lifetime in NaYF4:Yb,Er nanocrystals: role of nanocrystal size. , 2013, Nanoscale.

[190]  Guicheng Jiang,et al.  An effective polymer cross-linking strategy to obtain stable dispersions of upconverting NaYF4 nanoparticles in buffers and biological growth media for biolabeling applications. , 2012, Langmuir : the ACS journal of surfaces and colloids.

[191]  Lina Zhao,et al.  Enhanced red emission from GdF3:Yb3+,Er3+ upconversion nanocrystals by Li+ doping and their application for bioimaging. , 2012, Chemistry.

[192]  Qichun Zhang,et al.  Lanthanide-doped Na(x)ScF(3+x) nanocrystals: crystal structure evolution and multicolor tuning. , 2012, Journal of the American Chemical Society.

[193]  Dan Wang,et al.  Using 915 nm laser excited Tm³+/Er³+/Ho³+- doped NaYbF4 upconversion nanoparticles for in vitro and deeper in vivo bioimaging without overheating irradiation. , 2011, ACS nano.

[194]  Yanlei Yu,et al.  NIR-light-induced deformation of cross-linked liquid-crystal polymers using upconversion nanophosphors. , 2011, Journal of the American Chemical Society.

[195]  F. Huang,et al.  Dopant-induced phase transition: a new strategy of synthesizing hexagonal upconversion NaYF4 at low temperature. , 2011, Chemical communications.

[196]  Shaomin Ji,et al.  Ruthenium(II) polyimine complexes with a long-lived 3IL excited state or a 3MLCT/3 IL equilibrium: efficient triplet sensitizers for low-power upconversion. , 2011, Angewandte Chemie.

[197]  Guixia Liu,et al.  Functionalization of upconverted luminescent NaYF4:Yb/Er nanocrystals by folic acid–chitosan conjugates for targeted lung cancer cell imaging , 2011 .

[198]  Liangping Zhou,et al.  Controlled synthesis of uniform and monodisperse upconversion core/mesoporous silica shell nanocomposites for bimodal imaging. , 2012, Chemistry.

[199]  Stefan Andersson-Engels,et al.  Multibeam fluorescence diffuse optical tomography using upconverting nanoparticles. , 2010, Optics letters.

[200]  Gang Han,et al.  Combinatorial discovery of lanthanide-doped nanocrystals with spectrally pure upconverted emission. , 2012, Nano letters.

[201]  Hans H. Gorris,et al.  Maleimide activation of photon upconverting nanoparticles for bioconjugation , 2012, Nanotechnology.

[202]  Zhe Wang,et al.  Efficient fluorescence resonance energy transfer between upconversion nanophosphors and graphene oxide: a highly sensitive biosensing platform. , 2011, Chemical communications.

[203]  Stanislav Baluschev,et al.  Towards the IR limit of the triplet-triplet annihilation-supported up-conversion: tetraanthraporphyrin. , 2008, Chemistry.

[204]  Xiaogang Qu,et al.  Near-infrared upconversion controls photocaged cell adhesion. , 2014, Journal of the American Chemical Society.

[205]  Akio Yasuda,et al.  Metal-enhanced up-conversion fluorescence: effective triplet-triplet annihilation near silver surface. , 2005, Nano letters.

[206]  Zhuang Liu,et al.  Near-infrared light induced in vivo photodynamic therapy of cancer based on upconversion nanoparticles. , 2011, Biomaterials.

[207]  Mizuo Maeda,et al.  Cyclic RGD peptide-labeled upconversion nanophosphors for tumor cell-targeted imaging. , 2009, Biochemical and biophysical research communications.

[208]  Chun-Hua Yan,et al.  Highly luminescent self-organized sub-2-nm EuOF nanowires. , 2009, Journal of the American Chemical Society.

[209]  A. Shalav,et al.  Enhancing the Near-Infrared Spectral Response of Silicon Optoelectronic Devices via Up-Conversion , 2007, IEEE Transactions on Electron Devices.

[210]  Qing Peng,et al.  Lanthanide-doped nanocrystals: synthesis, optical-magnetic properties, and applications. , 2011, Accounts of chemical research.

[211]  B. Fei,et al.  Dual-modal fluorescent/magnetic bioprobes based on small sized upconversion nanoparticles of amine-functionalized BaGdF5:Yb/Er. , 2012, Nanoscale.

[212]  P. May,et al.  Near-infrared (NIR) to red and green up-conversion emission from silica sol-gel thin films made with La(0.45)Yb(0.50)Er(0.05)F(3) nanoparticles, hetero-looping-enhanced energy transfer (Hetero-LEET): a new up-conversion process. , 2007, Journal of the American Chemical Society.

[213]  Taeghwan Hyeon,et al.  Long-term real-time tracking of lanthanide ion doped upconverting nanoparticles in living cells. , 2011, Angewandte Chemie.

[214]  T. Soukka,et al.  Comparison of infrared-excited up-converting phosphors and europium nanoparticles as labels in a two-site immunoassay. , 2007, Analytica chimica acta.

[215]  Zhi-Gang Chen,et al.  Synthesis, characterization, and in vivo targeted imaging of amine-functionalized rare-earth up-converting nanophosphors. , 2009, Biomaterials.

[216]  Hans H Gorris,et al.  Photon-upconverting nanoparticles for optical encoding and multiplexing of cells, biomolecules, and microspheres. , 2013, Angewandte Chemie.

[217]  W. Soboyejo,et al.  Biofunctionalization, cytotoxicity, and cell uptake of lanthanide doped hydrophobically ligated NaYF4 upconversion nanophosphors , 2008 .

[218]  Chunhua Yan,et al.  Single-crystalline and near-monodispersed NaMF3 (M = Mn, Co, Ni, Mg) and LiMAlF6 (M = Ca, Sr) nanocrystals from cothermolysis of multiple trifluoroacetates in solution. , 2007, Chemistry, an Asian journal.

[219]  Jun Lin,et al.  Colloidal synthesis and remarkable enhancement of the upconversion luminescence of BaGdF5:Yb3+/Er3+ nanoparticles by active-shell modification , 2011 .

[220]  Angelo Monguzzi,et al.  Low‐Power‐Photon Up‐Conversion in Dual‐Dye‐Loaded Polymer Nanoparticles , 2012 .

[221]  Daniel R. Gamelin,et al.  Upconversion Processes in Transition Metal and Rare Earth Metal Systems , 2001 .

[222]  Hongjiang Liu,et al.  Optical Spectroscopy and Visible Upconversion Studies of YVO4:Er3+ Nanocrystals Synthesized by a Hydrothermal Process , 2006 .

[223]  Gordon G Wallace,et al.  Dye-Sensitized Solar Cell with Integrated Triplet-Triplet Annihilation Upconversion System. , 2013, The journal of physical chemistry letters.

[224]  Ian D. Williams,et al.  Controlled hydrothermal growth and up-conversion emission of NaLnF(4) (Ln = Y, Dy-Yb). , 2007, Inorganic Chemistry.

[225]  Yu Saito,et al.  Design of poly(ethylene glycol)/streptavidin coimmobilized upconversion nanophosphors and their application to fluorescence biolabeling. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[226]  Daxiang Cui,et al.  Toxicity Assessments of Near-infrared Upconversion Luminescent LaF3:Yb,Er in Early Development of Zebrafish Embryos , 2013, Theranostics.

[227]  Yuliang Zhao,et al.  Size-tunable synthesis of lanthanide-doped Gd2O3 nanoparticles and their applications for optical and magnetic resonance imaging , 2012 .

[228]  Wei Feng,et al.  Upconversion Nanophosphors Naluf4:Yb,Tm for Lymphatic Imaging In Vivo by Real-Time Upconversion Luminescence Imaging under Ambient Light and High-Resolution X-ray CT , 2013, Theranostics.

[229]  Yongsheng Liu,et al.  Lanthanide-doped luminescent nanoprobes: controlled synthesis, optical spectroscopy, and bioapplications. , 2013, Chemical Society reviews.

[230]  Weizhen Zeng,et al.  Structure, enhancement and white luminescence of multifunctional Lu₆O₅F₈:20%Yb³⁺,1%Er³⁺(Tm³⁺) nanoparticles via further doping with Li⁺ under different excitation sources. , 2013, Nanoscale.

[231]  A. Shalav,et al.  Application of NaYF 4 : Er 3 + up-converting phosphors for enhanced near-infrared silicon solar cell response , 2005 .

[232]  Paras N. Prasad,et al.  Monodisperse NaYbF4:Tm3+/NaGdF4 core/shell nanocrystals with near-infrared to near-infrared upconversion photoluminescence and magnetic resonance properties. , 2011, Nanoscale.

[233]  Ya-Wen Zhang,et al.  Size- and Phase-Controlled Synthesis of Monodisperse NaYF4:Yb,Er Nanocrystals from a Unique Delayed Nucleation Pathway Monitored with Upconversion Spectroscopy , 2007 .

[234]  Zilong Wang,et al.  Intramolecular RET enhanced visible light-absorbing bodipy organic triplet photosensitizers and application in photooxidation and triplet-triplet annihilation upconversion. , 2013, Journal of the American Chemical Society.

[235]  R. Tsien,et al.  The Fluorescent Toolbox for Assessing Protein Location and Function , 2006, Science.

[236]  Steven L. Murov,et al.  Handbook of photochemistry , 1973 .

[237]  Jun Lin,et al.  Electrospinning Preparation and Drug‐Delivery Properties of an Up‐conversion Luminescent Porous NaYF4:Yb3+, Er3+@Silica Fiber Nanocomposite , 2011 .

[238]  Francesco Scotognella,et al.  Upconversion-induced fluorescence in multicomponent systems: Steady-state excitation power threshold , 2008 .

[239]  Xueru Zhang,et al.  Optical temperature sensor through infrared excited blue upconversion emission in Tm3 +/Yb3 + codoped Y2O3 , 2012 .

[240]  Jun Lin,et al.  Up‐Conversion Luminescent and Porous NaYF4:Yb3+, Er3+@SiO2 Nanocomposite Fibers for Anti‐Cancer Drug Delivery and Cell Imaging , 2012 .

[241]  Steve Smith,et al.  Highly Luminescent NIR-to-Visible Upconversion Thin Films and Monoliths Requiring No High-Temperature Treatment , 2009 .

[242]  K. Yubuta,et al.  Flux Growth of Highly Crystalline NaYF4:Ln (Ln = Yb, Er, Tm) Crystals with Upconversion Fluorescence , 2011 .

[243]  Wenting Wu,et al.  Room temperature long-lived triplet excited state of fluorescein in N^N Pt(II) bisacetylide complex and its applications for triplet–triplet annihilation based upconversions , 2012 .

[244]  Chunhua Yan,et al.  Superparamagnetic and upconversion emitting Fe3O4/NaYF4:Yb,Er hetero-nanoparticles via a crosslinker anchoring strategy. , 2010, Chemical communications.

[245]  Xiu‐Ping Yan,et al.  Incorporation of computed tomography and magnetic resonance imaging function into NaYF4:Yb/Tm upconversion nanoparticles for in vivo trimodal bioimaging. , 2013, Analytical chemistry.

[246]  Jae-Hong Kim,et al.  Encapsulated triplet-triplet annihilation-based upconversion in the aqueous phase for sub-band-gap semiconductor photocatalysis. , 2012, Journal of the American Chemical Society.

[247]  C. Weder,et al.  Melt-processed polymer glasses for low-power upconversion via sensitized triplet–triplet annihilation , 2013 .

[248]  J. Loo,et al.  Gadolinium oxide ultranarrow nanorods as multimodal contrast agents for optical and magnetic resonance imaging. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[249]  J. Dawes,et al.  Single-nanocrystal sensitivity achieved by enhanced upconversion luminescence. , 2013, Nature nanotechnology.

[250]  Maxwell J. Crossley,et al.  Photochemical Upconversion Enhanced Solar Cells: Effect of a Back Reflector , 2012 .

[251]  Meng Wang,et al.  Immunoassay of goat antihuman immunoglobulin G antibody based on luminescence resonance energy transfer between near-infrared responsive NaYF4:Yb, Er upconversion fluorescent nanoparticles and gold nanoparticles. , 2009, Analytical chemistry.

[252]  M. Haase,et al.  Highly Efficient Multicolour Upconversion Emission in Transparent Colloids of Lanthanide‐Doped NaYF4 Nanocrystals , 2004 .

[253]  K. Krämer,et al.  Origin of the High Upconversion Green Luminescence Efficiency in β-NaYF4:2%Er3+,20%Yb3+ , 2011 .

[254]  G. Wegner,et al.  Efficient upconversion fluorescence in a blue-emitting spirobifluorene-anthracene copolymer doped with low concentrations of Pt(II)octaethylporphyrin. , 2005, The Journal of chemical physics.

[255]  Xiaomin Liu,et al.  Aptamer optical biosensor without bio-breakage using upconversion nanoparticles as donors. , 2012, Chemical communications.

[256]  Hans H Gorris,et al.  Tuning the Dual Emission of Photon‐Upconverting Nanoparticles for Ratiometric Multiplexed Encoding , 2011, Advanced materials.

[257]  Yong Zhang,et al.  Upconversion nanoparticle based LRET system for sensitive detection of MRSA DNA sequence. , 2013, Biosensors & bioelectronics.

[258]  Feng Wang,et al.  Synthesis of polyethylenimine/NaYF4 nanoparticles with upconversion fluorescence , 2006 .

[259]  Zhengwei Pan,et al.  Lanthanide-doped GdVO4 upconversion nanophosphors with tunable emissions and their applications for biomedical imaging , 2012 .

[260]  Jianzhang Zhao,et al.  Red-light excitable fluorescent platinum(II) bis(aryleneethynylene) bis(trialkylphosphine) complexes showing long-lived triplet excited states as triplet photosensitizers for triplet–triplet annihilation upconversion , 2013 .

[261]  Yong Zhang,et al.  Synthesis of hexagonal-phase core-shell NaYF4 nanocrystals with tunable upconversion fluorescence. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[262]  A. Cheetham,et al.  Efficient white light emission by upconversion in Yb(3+)-, Er(3+)- and Tm(3+)-doped Y2BaZnO5. , 2011, Chemical communications.

[263]  F. Auzel.  Upconversion and anti-Stokes processes with f and d ions in solids. , 2004, Chemical reviews.

[264]  Qian Liu,et al.  18F-Labeled magnetic-upconversion nanophosphors via rare-Earth cation-assisted ligand assembly. , 2011, ACS nano.

[265]  Guanying Chen,et al.  Sensing Using Rare-Earth-Doped Upconversion Nanoparticles , 2013, Theranostics.

[266]  K. Landfester,et al.  Micellar carrier for triplet–triplet annihilation-assisted photon energy upconversion in a water environment , 2011 .

[267]  N. Browning,et al.  Plasmonic enhanced emissions from cubic NaYF(4):Yb: Er/Tm nanophosphors. , 2011, Chemistry of materials : a publication of the American Chemical Society.

[268]  F. Zhong,et al.  Efficient enhancement of the visible-light absorption of cyclometalated Ir(III) complexes triplet photosensitizers with Bodipy and applications in photooxidation and triplet-triplet annihilation upconversion. , 2013, Inorganic chemistry.

[269]  D. Shen,et al.  An upconversion nanoparticle--Zinc phthalocyanine based nanophotosensitizer for photodynamic therapy. , 2014, Biomaterials.

[270]  Xiaogang Liu,et al.  Recent advances in the chemistry of lanthanide-doped upconversion nanocrystals. , 2009, Chemical Society reviews.

[271]  Ya-Wen Zhang,et al.  Highly Efficient Multicolor Up-Conversion Emissions and Their Mechanisms of Monodisperse NaYF4:Yb,Er Core and Core/Shell-Structured Nanocrystals , 2007 .

[272]  Yang Yang,et al.  Long-term in vivo biodistribution imaging and toxicity of polyacrylic acid-coated upconversion nanophosphors. , 2010, Biomaterials.

[273]  Jianzhang Zhao,et al.  Visible-Light-Harvesting Triphenylamine Ethynyl C60-BODIPY Dyads as Heavy-Atom-Free Organic Triplet Photosensitizers for Triplet-Triplet Annihilation Upconversion , 2012 .

[274]  Shaomin Ji,et al.  Long-lived room temperature deep-red/near-IR emissive intraligand triplet excited state (3IL) of naphthalimide in cyclometalated platinum(II) complexes and its application in upconversion. , 2011, Inorganic chemistry.

[275]  Zhiyu Qian,et al.  Amphiphilic chitosan modified upconversion nanoparticles for in vivo photodynamic therapy induced by near-infrared light , 2012 .

[276]  O. Wolfbeis,et al.  Luminescent sensing of oxygen using a quenchable probe and upconverting nanoparticles. , 2011, Angewandte Chemie.

[277]  Shan Jiang,et al.  Multicolor Core/Shell‐Structured Upconversion Fluorescent Nanoparticles , 2008 .

[278]  Markus Pollnau,et al.  Energy-transfer-upconversion models, their applicability and breakdown in the presence of spectroscopically distinct ion classes: A case study in amorphous Al2O3:Er3+ , 2013 .

[279]  C. Yeh,et al.  A general approach to silicate nanoshells: gadolinium silicate and gadolinium silicate:europium nanoshells for dual-modality optical and MR imaging. , 2009, Chemical communications.

[280]  Jun Lin,et al.  Hydrothermal Synthesis of Lanthanide Fluorides LnF3 (Ln = La to Lu) Nano-/Microcrystals with Multiform Structures and Morphologies , 2008 .

[281]  Shiwei Wu,et al.  Non-blinking and photostable upconverted luminescence from single lanthanide-doped nanocrystals , 2009, Proceedings of the National Academy of Sciences.

[282]  Wei Zhao,et al.  Upconverted emission from pyrene and di-tert-butylpyrene using Ir(ppy)3 as triplet sensitizer. , 2006, The journal of physical chemistry. A.

[283]  Jianzhang Zhao,et al.  Accessing the long-lived near-IR-emissive triplet excited state in naphthalenediimide with light-harvesting diimine platinum(II) bisacetylide complex and its application for upconversion. , 2011, Dalton transactions.

[284]  Fuyou Li,et al.  High contrast upconversion luminescence targeted imaging in vivo using peptide-labeled nanophosphors. , 2009, Analytical chemistry.

[285]  Y. Li,et al.  Down‐ and Up‐Conversion Luminescent Nanorods , 2007 .

[286]  Fang Liu,et al.  NIR light controlled photorelease of siRNA and its targeted intracellular delivery based on upconversion nanoparticles. , 2013, Nanoscale.

[287]  Jie Shen,et al.  Stem Cell Labeling using Polyethylenimine Conjugated (α-NaYbF4:Tm3+)/CaF2 Upconversion Nanoparticles , 2013, Theranostics.

[288]  Zhang Yong,et al.  Upconverting nanoparticles as nanotransducers for photodynamic therapy in cancer cells. , 2008, Nanomedicine.

[289]  Sava Sakadžić,et al.  Dendritic upconverting nanoparticles enable in vivo multiphoton microscopy with low-power continuous wave sources , 2012, Proceedings of the National Academy of Sciences.

[290]  Xiu‐Ping Yan,et al.  One-step solvothermal synthesis of targetable optomagnetic upconversion nanoparticles for in vivo bimodal imaging. , 2013, Analytical chemistry.

[291]  Shaomin Ji,et al.  Tuning the emissive triplet excited states of platinum(II) Schiff base complexes with pyrene, and application for luminescent oxygen sensing and triplet-triplet-annihilation based upconversions. , 2011, Dalton transactions.

[292]  Daxiang Cui,et al.  Folic acid-conjugated LaF3:Yb,Tm@SiO2 nanoprobes for targeting dual-modality imaging of upconversion luminescence and X-ray computed tomography. , 2012, The journal of physical chemistry. B.

[293]  F. Castellano,et al.  Annihilation limit of a visible-to-UV photon upconversion composition ascertained from transient absorption kinetics. , 2013, The journal of physical chemistry. A.

[294]  Markus P. Hehlen,et al.  Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems , 2000 .

[295]  Dimitri Geskus,et al.  Giant Optical Gain in a Rare‐Earth‐Ion‐Doped Microstructure , 2012, Advanced materials.

[296]  Taeghwan Hyeon,et al.  Nonblinking and Nonbleaching Upconverting Nanoparticles as an Optical Imaging Nanoprobe and T1 Magnetic Resonance Imaging Contrast Agent , 2009 .

[297]  Wei Feng,et al.  Biodistribution of sub-10 nm PEG-modified radioactive/upconversion nanoparticles. , 2013, Biomaterials.

[298]  Huan Xu,et al.  Towards whole-body imaging at the single cell level using ultra-sensitive stem cell labeling with oligo-arginine modified upconversion nanoparticles. , 2012, Biomaterials.

[299]  Wei Feng,et al.  Upconversion‐Nanophosphor‐Based Functional Nanocomposites , 2013, Advanced materials.

[300]  O. Wolfbeis,et al.  Upconverting luminescent nanoparticles for use in bioconjugation and bioimaging. , 2010, Current opinion in chemical biology.

[301]  Geoffrey A Ozin,et al.  Synthesis of ligand-free colloidally stable water dispersible brightly luminescent lanthanide-doped upconverting nanoparticles. , 2011, Nano letters.

[302]  S. Wilhelm,et al.  Multicolor Upconversion Nanoparticles for Protein Conjugation , 2013, Theranostics.

[303]  Matthew F. Paige,et al.  Mechanisms of low-power noncoherent photon upconversion in metalloporphyrin-organic blue emitter systems in solution. , 2009, The journal of physical chemistry. A.

[304]  Hong-Yuan Chen,et al.  Polymeric optodes based on upconverting nanorods for fluorescent measurements of pH and metal ions in blood samples. , 2012, Analytical chemistry.

[305]  Xiaohan Liu,et al.  A "neck-formation" strategy for an antiquenching magnetic/upconversion fluorescent bimodal cancer probe. , 2010, Chemistry.

[306]  Yang Wei,et al.  Synthesis of Oil-Dispersible Hexagonal-Phase and Hexagonal-Shaped NaYF4:Yb,Er Nanoplates , 2006 .

[307]  Mingyuan Gao,et al.  Magnetic/upconversion fluorescent NaGdF4:Yb,Er nanoparticle-based dual-modal molecular probes for imaging tiny tumors in vivo. , 2013, ACS nano.

[308]  Fan Zhang,et al.  Fluorescence Upconversion Microbarcodes for Multiplexed Biological Detection: Nucleic Acid Encoding , 2011, Advanced materials.

[309]  Qingfeng Xiao,et al.  A uniform sub-50 nm-sized magnetic/upconversion fluorescent bimodal imaging agent capable of generating singlet oxygen by using a 980 nm laser. , 2012, Chemistry.

[310]  Muthu Kumara Gnanasammandhan,et al.  Plasmon enhanced upconversion luminescence of NaYF4:Yb,Er@SiO2@Ag core-shell nanocomposites for cell imaging. , 2012, Nanoscale.

[311]  Otto S. Wolfbeis,et al.  Upconverting nanoparticle based optical sensor for carbon dioxide , 2010 .

[312]  Zhen Cheng,et al.  In vitro and in vivo uncaging and bioluminescence imaging by using photocaged upconversion nanoparticles. , 2012, Angewandte Chemie.

[313]  Liangping Zhou,et al.  Radiopaque fluorescence-transparent TaOx decorated upconversion nanophosphors for in vivo CT/MR/UCL trimodal imaging. , 2012, Biomaterials.

[314]  Shanshan Huang,et al.  Controllable and white upconversion luminescence in BaYF5:Ln3+ (Ln = Yb, Er, Tm) nanocrystals , 2011 .

[315]  R. Austin,et al.  Synthesis of Stable Block-Copolymer-Protected NaYF4:Yb3+, Er3+ Up-Converting Phosphor Nanoparticles , 2010 .

[316]  A. Kawai,et al.  Kinetics of photon upconversion in ionic liquids: energy transfer between sensitizer and emitter molecules. , 2013, The journal of physical chemistry. B.

[317]  Lehui Lu,et al.  Dual modal in vivo imaging using upconversion luminescence and enhanced computed tomography properties. , 2011, Nanoscale.

[318]  Jun Lin,et al.  Synthesis of Magnetic, Up‐Conversion Luminescent, and Mesoporous Core–Shell‐Structured Nanocomposites as Drug Carriers , 2010 .

[319]  W.G.J.H.M. van Sark,et al.  Enhanced near-infrared response of a-Si:H solar cells with β-NaYF4:Yb3+ (18%), Er3+ (2%) upconversion phosphors , 2010 .

[320]  F. V. van Veggel,et al.  Bright white light through up-conversion of a single NIR source from sol-gel-derived thin film made with Ln3+-doped LaF3 nanoparticles. , 2005, Journal of the American Chemical Society.

[321]  Thomas Nann,et al.  A four-color colloidal multiplexing nanoparticle system. , 2008, ACS nano.

[322]  Hong Zhang,et al.  Controlled synthesis, formation mechanism, and great enhancement of red upconversion luminescence of NaYF4:Yb3+, Er3+ nanocrystals/submicroplates at low doping level. , 2008, The journal of physical chemistry. B.

[323]  John-Christopher Boyer,et al.  Remote-control photoswitching using NIR light. , 2009, Journal of the American Chemical Society.

[324]  Hai Zhu,et al.  Upconverting near-infrared light through energy management in core-shell-shell nanoparticles. , 2013, Angewandte Chemie.

[325]  Zhijia Wang,et al.  Novel microwave-assisted solvothermal synthesis of NaYF4:Yb,Er upconversion nanoparticles and their application in cancer cell imaging. , 2011, Langmuir : the ACS journal of surfaces and colloids.

[326]  Yanqing Hua,et al.  A NaYbF4: Tm3+ nanoprobe for CT and NIR-to-NIR fluorescent bimodal imaging. , 2012, Biomaterials.

[327]  Alexandre Haefele,et al.  Upconversion-powered photoelectrochemistry. , 2012, Chemical communications.

[328]  Juanjuan Peng,et al.  Near‐Infrared Photoregulated Drug Release in Living Tumor Tissue via Yolk‐Shell Upconversion Nanocages , 2014 .

[329]  Robert Austin,et al.  Nanofabricated upconversion nanoparticles for photodynamic therapy. , 2009, Optics express.

[330]  Zhiguo Zhang,et al.  Four-photon upconversion induced by infrared diode laser excitation in rare-earth-ion-doped Y2O3 nanocrystals , 2007 .

[331]  Anping Yang,et al.  Ultra-broadband near-infrared excitable upconversion core/shell nanocrystals. , 2012, Chemical communications.

[332]  Jing Wang,et al.  Amphiphilic silane modified NaYF4:Yb,Er loaded with Eu(TTA)3(TPPO)2 nanoparticles and their multi-functions: dual mode temperature sensing and cell imaging. , 2013, Nanoscale.

[333]  Jianzhang Zhao,et al.  Light-harvesting fullerene dyads as organic triplet photosensitizers for triplet-triplet annihilation upconversions. , 2012, The Journal of organic chemistry.

[334]  R. Roy,et al.  Carbohydrate-coated lanthanide-doped upconverting nanoparticles for lectin recognition , 2010 .

[335]  W. Cai,et al.  Enhanced upconversion emission in Yb3+ and Er3+ codoped NaGdF4 nanocrystals by introducing Li+ ions. , 2012, Nanoscale.

[336]  M. Tan,et al.  Surfactant effects on efficiency enhancement of infrared-to-visible upconversion emissions of NaYF4:Yb-Er. , 2011, ACS applied materials & interfaces.

[337]  Lehui Lu,et al.  Designing lanthanide-doped nanocrystals with both up- and down-conversion luminescence for anti-counterfeiting. , 2011, Nanoscale.

[338]  Fang Liu,et al.  Near-infrared light-mediated photoactivation of a platinum antitumor prodrug and simultaneous cellular apoptosis imaging by upconversion-luminescent nanoparticles. , 2014, Angewandte Chemie.

[339]  Qian Liu,et al.  Multifunctional rare-earth self-assembled nanosystem for tri-modal upconversion luminescence /fluorescence /positron emission tomography imaging. , 2011, Biomaterials.

[340]  Wei Feng,et al.  Polyphosphoric acid capping radioactive/upconverting NaLuF4:Yb,Tm,153Sm nanoparticles for blood pool imaging in vivo. , 2013, Biomaterials.

[341]  Jae-Hong Kim,et al.  Red-to-Blue/Cyan/Green Upconverting Microcapsules for Aqueous- and Dry-Phase Color Tuning and Magnetic Sorting , 2014 .

[342]  Fan Zhang,et al.  Uniform nanostructured arrays of sodium rare-earth fluorides for highly efficient multicolor upconversion luminescence. , 2007, Angewandte Chemie.

[343]  Wenting Wu,et al.  Coumarin phosphorescence observed with N^N Pt(II) bisacetylide complex and its applications for luminescent oxygen sensing and triplet-triplet-annihilation based upconversion. , 2011, Dalton transactions.

[344]  G. Demopoulos,et al.  Near‐Infrared Sunlight Harvesting in Dye‐Sensitized Solar Cells Via the Insertion of an Upconverter‐TiO2 Nanocomposite Layer , 2010, Advanced materials.

[345]  Joseph P. Dinnocenzo,et al.  Low-power green-to-blue and blue-to-UV upconversion in rigid polymer films , 2009 .

[346]  Hong Zhang,et al.  Effect of annealing on upconversion luminescence of ZnO : Er3+ nanocrystals and high thermal sensitivity , 2007 .

[347]  Tymish Y. Ohulchanskyy,et al.  Facile Synthesis and Potential Bioimaging Applications of Hybrid Upconverting and Plasmonic NaGdF4: Yb3+, Er3+/Silica/Gold Nanoparticles , 2013, Theranostics.

[348]  A. Castellan,et al.  Photodimerization of anthracenes in fluid solution:structural aspects , 2000 .

[349]  Zhengquan Li,et al.  An efficient and user-friendly method for the synthesis of hexagonal-phase NaYF4:Yb, Er/Tm nanocrystals with controllable shape and upconversion fluorescence , 2008, Nanotechnology.

[350]  Ying-shuai Wang,et al.  Magnetic/upconversion luminescent mesoparticles of Fe3O4@LaF3:Yb3+, Er3+ for dual-modal bioimaging. , 2012, Chemical communications.

[351]  Jianzhang Zhao,et al.  Preparation of ketocoumarins as heavy atom-free triplet photosensitizers for triplet—triplet annihilation upconversio , 2013, Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology.

[352]  Fiorenzo Vetrone,et al.  Synthesis of colloidal upconverting NaYF4 nanocrystals doped with Er3+, Yb3+ and Tm3+, Yb3+ via thermal decomposition of lanthanide trifluoroacetate precursors. , 2006, Journal of the American Chemical Society.

[353]  N. Yao,et al.  An investigation of the thermal sensitivity and stability of the β-NaYF4: Yb, Er upconversion nanophosphors , 2010 .

[354]  K. Landfester,et al.  Annihilation upconversion in cells by embedding the dye system in polymeric nanocapsules. , 2011, Macromolecular bioscience.

[355]  A. Speghini,et al.  Bright white upconversion emission from Tm3+/Yb3+/Er3+ doped Lu3Ga5O12 nanocrystals , 2008 .

[356]  Kai Yang,et al.  Multifunctional nanoparticles for upconversion luminescence/MR multimodal imaging and magnetically targeted photothermal therapy. , 2012, Biomaterials.

[357]  S. Fischer,et al.  Highly Efficient IR to NIR Upconversion in Gd2O2S: Er3+ for Photovoltaic Applications , 2013 .

[358]  W. Webb,et al.  Measurement of two-photon excitation cross sections of molecular fluorophores with data from 690 to 1050 nm , 1996 .

[359]  Yong Zhang,et al.  Gold nanoshell coated NaYF4 nanoparticles for simultaneously enhanced upconversion fluorescence and darkfield imaging , 2012 .

[360]  F. Ortica,et al.  New molecular pairs for low power non-coherent triplet–triplet annihilation based upconversion: dependence on the triplet energies of sensitizer and emitter , 2013 .

[361]  Dongmei Yang,et al.  Poly(acrylic acid) modified lanthanide-doped GdVO4 hollow spheres for up-conversion cell imaging, MRI and pH-dependent drug release. , 2013, Nanoscale.

[362]  Wei Feng,et al.  Cyclometallated ruthenium complex-modified upconversion nanophosphors for selective detection of Hg2+ ions in water. , 2014, Nanoscale.

[363]  Shan Jiang,et al.  Upconversion nanoparticle-based FRET system for study of siRNA in live cells. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[364]  K. Landfester,et al.  All Organic Nanofibers As Ultralight Versatile Support for Triplet-Triplet Annihilation Upconversion. , 2013, ACS macro letters.

[365]  Yong Zhang,et al.  Singlet oxygen-induced apoptosis of cancer cells using upconversion fluorescent nanoparticles as a carrier of photosensitizer. , 2010, Nanomedicine : nanotechnology, biology, and medicine.

[366]  Shaomin Ji,et al.  Accessing the long-lived emissive 3IL triplet excited states of coumarin fluorophores by direct cyclometallation and its application for oxygen sensing and upconversion. , 2011, Dalton transactions.

[367]  Wei Li,et al.  Direct imaging the upconversion nanocrystal core/shell structure at the subnanometer level: shell thickness dependence in upconverting optical properties. , 2012, Nano letters.

[368]  Fuyou Li,et al.  Multimodal-luminescence core-shell nanocomposites for targeted imaging of tumor cells. , 2009, Chemistry.

[369]  Zhengquan Li,et al.  Seed-mediated synthesis of NaY F4:Y b, Er/NaGdF4 nanocrystals with improved upconversion fluorescence and MR relaxivity , 2010, Nanotechnology.

[370]  Christoph Weder,et al.  Noncoherent low-power upconversion in solid polymer films. , 2007, Journal of the American Chemical Society.

[371]  Jun Lin,et al.  Rare earth fluoride nano-/microcrystals: synthesis, surface modification and application , 2010 .

[372]  F. Castellano,et al.  Pd(II) phthalocyanine-sensitized triplet-triplet annihilation from rubrene. , 2008, The journal of physical chemistry. A.

[373]  Yibin Kang,et al.  Pegylated Composite Nanoparticles Containing Upconverting Phosphors and meso‐Tetraphenyl porphine (TPP) for Photodynamic Therapy , 2011 .

[374]  Kai Yang,et al.  In vivo pharmacokinetics, long-term biodistribution and toxicology study of functionalized upconversion nanoparticles in mice. , 2011, Nanomedicine.

[375]  B. Gates,et al.  Two-way photoswitching using one type of near-infrared light, upconverting nanoparticles, and changing only the light intensity. , 2010, Journal of the American Chemical Society.

[376]  Liangping Zhou,et al.  Gd3+‐Ion‐Doped Upconversion Nanoprobes: Relaxivity Mechanism Probing and Sensitivity Optimization , 2013 .

[377]  Taeghwan Hyeon,et al.  Endocytosis, intracellular transport, and exocytosis of lanthanide-doped upconverting nanoparticles in single living cells. , 2012, Biomaterials.

[378]  Pingwu Du,et al.  Energy upconversion sensitized by a platinum(II) terpyridyl acetylide complex , 2010 .

[379]  S. Baluschev,et al.  A general approach for non-coherently excited annihilation up-conversion: transforming the solar-spectrum , 2008 .

[380]  Fang Wang,et al.  Multifunctional core-shell upconverting nanoparticles for imaging and photodynamic therapy of liver cancer cells. , 2012, Chemistry, an Asian journal.

[381]  Ning Kang,et al.  Rapid microwave-enhanced hydrothermal synthesis and shape evolution of uniform NaGdF4:Yb, Er (Tm/Ho) nanocrystals with upconversion and paramagnetic properties , 2012, Nanotechnology.

[382]  Ququan Wang,et al.  Neurotoxin-conjugated upconversion nanoprobes for direct visualization of tumors under near-infrared irradiation. , 2010, Biomaterials.

[383]  Zhengquan Li,et al.  Monodisperse silica-coated polyvinylpyrrolidone/NaYF(4) nanocrystals with multicolor upconversion fluorescence emission. , 2006, Angewandte Chemie.

[384]  G. Qin,et al.  Greatly enhanced size-tunable ultraviolet upconversion luminescence of monodisperse β-NaYF4:Yb,Tm nanocrystals , 2011 .

[385]  Lehui Lu,et al.  A high-performance ytterbium-based nanoparticulate contrast agent for in vivo X-ray computed tomography imaging. , 2012, Angewandte Chemie.

[386]  F. Castellano,et al.  Low power upconversion using MLCT sensitizers. , 2005, Chemical communications.

[387]  Oliver Benson,et al.  Plasmon-enhanced upconversion in single NaYF4:Yb3+/Er3+ codoped nanocrystals. , 2010, Nano letters.

[388]  Jianfang Wang,et al.  Reversible luminescence switching of NaYF4:Yb,Er nanoparticles with controlled assembly of gold nanoparticles. , 2009, Chemical communications.

[389]  A. Penzkofer,et al.  Absorption and emission spectroscopic characterization of platinum-octaethyl-porphyrin (PtOEP) , 2006 .

[390]  Hongwei Song,et al.  Multifunctional NaYF4 : Yb3+,Er3+@Ag core/shell nanocomposites: integration of upconversion imaging and photothermal therapy , 2011 .

[391]  Yalin Lu,et al.  Distance Dependence of Gold-Enhanced Upconversion luminescence in Au/SiO2/Y2O3:Yb3+, Er3+ Nanoparticles , 2013, Theranostics.

[392]  Gan-Moog Chow,et al.  Critical shell thickness and emission enhancement of NaYF_4:Yb,Er/NaYF_4/silica core/shell/shell nanoparticles , 2009 .

[393]  P. Ceroni.  Energy up-conversion by low-power excitation: new applications of an old concept. , 2011, Chemistry.

[394]  O. Wolfbeis,et al.  Quenching of the luminescence of upconverting luminescent nanoparticles by heavy metal ions. , 2011, Chemistry.

[395]  R. Yan,et al.  Down/Up Conversion in Ln3+‐Doped YF3 Nanocrystals , 2005 .

[396]  J. Zhang,et al.  An optical sensor for Cu(II) detection with upconverting luminescent nanoparticles as an excitation source. , 2012, Chemical communications.

[397]  F. Castellano,et al.  Supra-nanosecond dynamics of a red-to-blue photon upconversion system. , 2009, Inorganic chemistry.

[398]  F. Castellano,et al.  Photochemical upconversion approach to broad-band visible light generation. , 2008, The journal of physical chemistry. A.

[399]  Jianzhang Zhao,et al.  Visible light-harvesting trans bis(alkylphosphine) platinum(II)-alkynyl complexes showing long-lived triplet excited states as triplet photosensitizers for triplet-triplet annihilation upconversion. , 2013, Dalton transactions.

[400]  Zhan Shi,et al.  Breakthrough in concentration quenching threshold of upconversion luminescence via spatial separation of the emitter doping area for bio-applications. , 2011, Chemical communications.

[401]  Chao Zhang,et al.  Luminescence Modulation of Ordered Upconversion Nanopatterns by a Photochromic Diarylethene: Rewritable Optical Storage with Nondestructive Readout , 2010, Advanced materials.

[402]  Kazuo Tanaka,et al.  Environment-responsive upconversion based on dendrimer-supported efficient triplet-triplet annihilation in aqueous media. , 2010, Chemical communications.

[403]  Depu Chen,et al.  Polyol-mediated synthesis of water-soluble LaF3:Yb,Er upconversion fluorescent nanocrystals , 2007 .

[404]  S. Vinogradov,et al.  Magnetic Field Effects on Triplet-Triplet Annihilation in Solutions: Modulation of Visible/NIR Luminescence. , 2013, The journal of physical chemistry letters.

[405]  G. Wegner,et al.  Up-conversion fluorescence: noncoherent excitation by sunlight. , 2006, Physical review letters.

[406]  Hongwei Song,et al.  Structure and Upconversion Luminescence of Hydrothermal PbWO4:Er3+, Yb3+ Powders , 2008 .

[407]  Jun Chen,et al.  Morphologically controlled synthesis of colloidal upconversion nanophosphors and their shape-directed self-assembly , 2010, Proceedings of the National Academy of Sciences.

[408]  Tero Soukka,et al.  Upconversion fluorescence resonance energy transfer in a homogeneous immunoassay for estradiol. , 2006, Analytical chemistry.

[409]  Sailing He,et al.  Optimization of Optical Excitation of Upconversion Nanoparticles for Rapid Microscopy and Deeper Tissue Imaging with Higher Quantum Yield , 2013, Theranostics.

[410]  Manoj Kumar,et al.  Highly sensitive and selective oligonucleotide sensor for sickle cell disease gene using photon upconverting nanoparticles. , 2009, Biosensors & bioelectronics.

[411]  Kerry R. Delaney,et al.  Two-Photon Upconversion Laser (Scanning and Wide-Field) Microscopy Using Ln3+-Doped NaYF4 Upconverting Nanocrystals: A Critical Evaluation of their Performance and Potential in Bioimaging , 2011 .

[412]  Dai-Wen Pang,et al.  Aptamer biosensor based on fluorescence resonance energy transfer from upconverting phosphors to carbon nanoparticles for thrombin detection in human plasma. , 2011, Analytical chemistry.

[413]  A. Speghini,et al.  Colloidal Tm3+/Yb3+‐Doped LiYF4 Nanocrystals: Multiple Luminescence Spanning the UV to NIR Regions via Low‐Energy Excitation , 2009 .

[414]  Jianzhang Zhao,et al.  Triplet photosensitizers: from molecular design to applications. , 2013, Chemical Society reviews.

[415]  Murad J Y Tayebjee,et al.  On the efficiency limit of triplet-triplet annihilation for photochemical upconversion. , 2010, Physical chemistry chemical physics : PCCP.

[416]  Jianzhang Zhao,et al.  BF2-bound chromophore-containing N⁁NPt(II) bisacetylide complex and its application as sensitizer for triplet–triplet annihilation based upconversion , 2012 .

[417]  Yong Zhang,et al.  Remote activation of biomolecules in deep tissues using near-infrared-to-UV upconversion nanotransducers , 2012, Proceedings of the National Academy of Sciences.

[418]  Xin Zhang,et al.  One-pot hydrothermal synthesis of lanthanide ions doped one-dimensional upconversion submicrocrystals and their potential application in vivo CT imaging. , 2013, Nanoscale.

[419]  P. Gibart,et al.  Below Band-Gap IR Response of Substrate-Free GaAs Solar Cells Using Two-Photon Up-Conversion , 1996 .

[420]  D. Baillie,et al.  Photomodulation of fluorescent upconverting nanoparticle markers in live organisms by using molecular switches. , 2012, Chemistry.

[421]  Yun Sun,et al.  Water-stable NaLuF4-based upconversion nanophosphors with long-term validity for multimodal lymphatic imaging. , 2012, Biomaterials.

[422]  Ping Huang,et al.  Highly efficient near‐infrared to visible upconversion luminescence in transparent glass ceramics containing Yb3+/Er3+:NaYF4 nanocrystals , 2008 .

[423]  Wei Feng,et al.  Radioisotope post-labeling upconversion nanophosphors for in vivo quantitative tracking. , 2013, Biomaterials.

[424]  M. Haase,et al.  Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline β-NaGdF4: Yb3+, Er3+ , 2005 .

[425]  Yanlei Yu,et al.  Red-light-controllable liquid-crystal soft actuators via low-power excited upconversion based on triplet-triplet annihilation. , 2013, Journal of the American Chemical Society.

[426]  K. Landfester,et al.  Triplet-triplet annihilation upconversion based nanocapsules for bioimaging under excitation by red and deep-red light. , 2013, Macromolecular bioscience.

[427]  Chenghui Liu,et al.  Controlled synthesis of hexagon shaped lanthanide-doped LaF3 nanoplates with multicolor upconversion fluorescence , 2007 .

[428]  Zhuang Liu,et al.  Multicolor In Vivo Imaging of Upconversion Nanoparticles with Emissions Tuned by Luminescence Resonance Energy Transfer , 2011 .

[429]  Chunhua Yan,et al.  Colloidal synthesis and blue based multicolor upconversion emissions of size and composition controlled monodisperse hexagonal NaYF4:Yb,Tm nanocrystals. , 2010, Nanoscale.

[430]  G. Mariotto,et al.  Lanthanide doped upconverting colloidal CaF2 nanoparticles prepared by a single-step hydrothermal method: toward efficient materials with near infrared-to-near infrared upconversion emission. , 2011, Nanoscale.

[431]  Jun Lin,et al.  Different Microstructures of β-NaYF4 Fabricated by Hydrothermal Process: Effects of pH Values and Fluoride Sources , 2007 .

[432]  F. Castellano,et al.  Anti-Stokes delayed fluorescence from metal-organic bichromophores. , 2004, Chemical communications.

[433]  Gan-Moog Chow,et al.  Water -soluble NaYF4:Yb,Er (Tm)/NaYF4/Polymer Core/Shell/Shell nanoparticles with significant enhancement of upconversion fluorescence , 2007 .

[434]  J. Bünzli.  Lanthanide luminescence for biomedical analyses and imaging. , 2010, Chemical reviews.

[435]  Shanshan Huang,et al.  Shape-Controllable Synthesis and Upconversion Properties of Lutetium Fluoride (Doped with Yb3+/Er3+) Microcrystals by Hydrothermal Process , 2008 .

[436]  R. Pal,et al.  Cell-penetrating metal complex optical probes: targeted and responsive systems based on lanthanide luminescence. , 2009, Accounts of chemical research.

[437]  D. Wiechert,et al.  Efficient Luminescence from Rare‐Earth Fluoride Nanoparticles with Optically Functional Shells , 2006 .

[438]  E. W. Barrera,et al.  Emission properties of hydrothermal Yb3 + , Er3 + and Yb3 + , Tm3 + -codoped Lu2O3 nanorods: upconversion, cathodoluminescence and assessment of waveguide behavior , 2011, Nanotechnology.

[439]  Wei Feng,et al.  Water-soluble lanthanide upconversion nanophosphors: Synthesis and bioimaging applications in vivo , 2014 .

[440]  M. Kumar,et al.  Nanoparticle-based Photosensitizers Under CW Infrared Excitation. , 2007, Chemistry of materials : a publication of the American Chemical Society.

[441]  Ralph Weissleder,et al.  Upconverting luminescent nanomaterials: application to in vivo bioimaging. , 2009, Chemical communications.

[442]  M. Samoć,et al.  Modulation of up-conversion luminescence of lanthanide(III) ion co-doped NaYF4 nanoparticles using gold nanorods , 2012 .

[443]  Christopher B. Murray,et al.  Metal-enhanced upconversion luminescence tunable through metal nanoparticle-nanophosphor separation. , 2012, ACS nano.

[444]  F. Fang,et al.  NaGdF4 nanoparticle-based molecular probes for magnetic resonance imaging of intraperitoneal tumor xenografts in vivo. , 2013, ACS nano.

[445]  F. Castellano,et al.  Low power visible-to-UV upconversion. , 2009, The journal of physical chemistry. A.

[446]  Jun Lin,et al.  Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications. , 2014, Chemical reviews.

[447]  Jianzhang Zhao,et al.  Thienyl-substituted BODIPYs with strong visible light-absorption and long-lived triplet excited states as organic triplet sensitizers for triplet–triplet annihilation upconversion , 2012 .

[448]  M. Pollnau,et al.  Ultra-narrow-linewidth, single-frequency distributed feedback waveguide laser in Al2O3:Er3+ on silicon. , 2010, Optics letters.

[449]  Chun-Hua Yan,et al.  Clean and Flexible Modification Strategy for Carboxyl/Aldehyde‐Functionalized Upconversion Nanoparticles and Their Optical Applications , 2009 .

[450]  Matthias I. J. Stich,et al.  pH sensor based on upconverting luminescent lanthanide nanorods. , 2009, Chemical communications.

[451]  Zhuang Liu,et al.  Upconversion Nanoparticles for Photodynamic Therapy and Other Cancer Therapeutics , 2013, Theranostics.

[452]  Atsushi Kobayashi,et al.  Reevaluation of absolute luminescence quantum yields of standard solutions using a spectrometer with an integrating sphere and a back-thinned CCD detector. , 2009, Physical chemistry chemical physics : PCCP.

[453]  Wei Feng,et al.  Upconversion nanoparticles dramatically promote plant growth without toxicity , 2012, Nano Research.

[454]  C. Zaldo,et al.  Enhanced upconversion multicolor and white light luminescence in SiO2-coated lanthanide-doped GdVO4 hydrothermal nanocrystals , 2012, Nanotechnology.

[455]  John-Christopher Boyer,et al.  Absolute quantum yield measurements of colloidal NaYF4: Er3+, Yb3+ upconverting nanoparticles. , 2010, Nanoscale.

[456]  Francisco Sanz-Rodríguez,et al.  Bio-functionalization of ligand-free upconverting lanthanide doped nanoparticles for bio-imaging and cell targeting. , 2012, Nanoscale.

[457]  Yichun Liu,et al.  Effects of Er3+ concentration on UV/blue upconverted luminescence and a three-photon process in the cubic nanocrystalline Y2O3:Er3+ , 2006 .

[458]  Chun-Hua Yan,et al.  Paradigms and challenges for bioapplication of rare earth upconversion luminescent nanoparticles: small size and tunable emission/excitation spectra. , 2014, Accounts of chemical research.

[459]  X. Qian,et al.  Facile preparation of well-defined hydrophilic core-shell upconversion nanoparticles for selective cell membrane glycan labeling and cancer cell imaging. , 2014, Analytical chemistry.

[460]  B. Albinsson,et al.  Photon upconversion facilitated molecular solar energy storage , 2013 .

[461]  Yujie Xiong,et al.  Modification of NaYF4:Yb,Er@SiO2 Nanoparticles with Gold Nanocrystals for Tunable Green-to-Red Upconversion Emissions , 2011 .

[462]  Hong Zhang,et al.  Upconversion luminescence of β-NaYF4: Yb3+, Er3+@β-NaYF4 core/shell nanoparticles: Excitation power density and surface dependence , 2009 .

[463]  Jianzhang Zhao,et al.  Observation of the room temperature phosphorescence of Bodipy in visible light-harvesting Ru(II) polyimine complexes and application as triplet photosensitizers for triplet–triplet-annihilation upconversion and photocatalytic oxidation , 2013 .

[464]  R. Tsien,et al.  green fluorescent protein , 2020, Catalysis from A to Z.

[465]  Helmut Schäfer,et al.  Synthesis and Optical Properties of KYF4/Yb, Er Nanocrystals, and their Surface Modification with Undoped KYF4 , 2008 .

[466]  Britt A. Minch,et al.  Two pathways for photon upconversion in model organic compound systems , 2007 .

[467]  Jia-yue Sun,et al.  Facile synthesis of well-dispersed SrF2:Yb3+/Er3+ upconversion nanocrystals in oleate complex systems , 2011 .

[468]  Ya‐Wen Zhang,et al.  Atomically efficient synthesis of self-assembled monodisperse and ultrathin lanthanide oxychloride nanoplates. , 2009, Journal of the American Chemical Society.

[469]  M. Fujii,et al.  Upconversion Luminescence of Er and Yb Codoped NaYF4 Nanoparticles with Metal Shells , 2013 .

[470]  Jie Shen,et al.  Rare-Earth nanoparticles with enhanced upconversion emission and suppressed rare-Earth-ion leakage. , 2012, Chemistry.

[471]  Anping Yang,et al.  Monodisperse upconversion Er3+/Yb3+:MFCl (M = Ca, Sr, Ba) nanocrystals synthesized via a seed-based chlorination route. , 2011, Chemical communications.

[472]  Jung Ho Yoo,et al.  Facile Synthesis of Ultrasmall and Hexagonal NaGdF4: Yb3+, Er3+ Nanoparticles with Magnetic and Upconversion Imaging Properties , 2010 .

[473]  Fuyou Li,et al.  Hydrothermal synthesis of hexagonal lanthanide-doped LaF3 nanoplates with bright upconversion luminescence , 2008, Nanotechnology.

[474]  Qian Liu,et al.  High-efficiency upconversion luminescent sensing and bioimaging of Hg(II) by chromophoric ruthenium complex-assembled nanophosphors. , 2011, ACS nano.

[475]  Yongsheng Liu,et al.  A Strategy to Achieve Efficient Dual‐Mode Luminescence of Eu3+ in Lanthanides Doped Multifunctional NaGdF4 Nanocrystals , 2010, Advanced materials.

[476]  Chun-Hua Yan,et al.  Uniform Alkaline Earth Fluoride Nanocrystals with Diverse Shapes Grown from Thermolysis of Metal Trifluoroacetates in Hot Surfactant Solutions , 2009 .

[477]  Yun Sun,et al.  Fluorine-18 labeled rare-earth nanoparticles for positron emission tomography (PET) imaging of sentinel lymph node. , 2011, Biomaterials.

[478]  Fuyou Li,et al.  Phosphorescent chemosensors based on heavy-metal complexes. , 2010, Chemical Society reviews.

[479]  Quan Yuan,et al.  Near-infrared-light-mediated imaging of latent fingerprints based on molecular recognition. , 2014, Angewandte Chemie.

[480]  Akio Yasuda,et al.  Blue-green up-conversion: noncoherent excitation by NIR light. , 2007, Angewandte Chemie.

[481]  Xiang-Jun Zheng,et al.  Synthesis, Upconversion Luminescence and Magnetic Properties of New Lanthanide–Organic Frameworks with (43)2(46,66,83) Topology , 2007 .

[482]  J. Boyer,et al.  A UV-blocking polymer shell prevents one-photon photoreactions while allowing multi-photon processes in encapsulated upconverting nanoparticles. , 2013, Angewandte Chemie.

[483]  Y. Ju,et al.  Controlled synthesis of lanthanide-doped NaYF4 upconversion nanocrystals via ligand induced crystal phase transition and silica coating , 2007 .

[484]  Yingxin Ma,et al.  Monodisperse upconversion NaYF4 nanocrystals: Syntheses and bioapplications , 2011 .

[485]  Wei Feng,et al.  Upconversion luminescence imaging of cells and small animals , 2013, Nature Protocols.

[486]  Paras N. Prasad,et al.  (α-NaYbF4:Tm(3+))/CaF2 core/shell nanoparticles with efficient near-infrared to near-infrared upconversion for high-contrast deep tissue bioimaging. , 2012, ACS nano.

[487]  N. Wu,et al.  Up‐ and Down‐Conversion Cubic Zirconia and Hafnia Nanobelts , 2008 .

[488]  Renren Deng,et al.  Tuning upconversion through energy migration in core-shell nanoparticles. , 2011, Nature materials.

[489]  Jianhua Hao,et al.  Water dispersible ultra-small multifunctional KGdF4:Tm3+, Yb3+ nanoparticles with near-infrared to near-infrared upconversion , 2011 .

[490]  Yu-Lin Chou,et al.  Near-infrared light photocontrolled targeting, bioimaging, and chemotherapy with caged upconversion nanoparticles in vitro and in vivo. , 2013, ACS nano.

[491]  Ling-Dong Sun,et al.  Nd(3+)-sensitized upconversion nanophosphors: efficient in vivo bioimaging probes with minimized heating effect. , 2013, ACS nano.

[492]  Daxiang Cui,et al.  Dual Phase‐Controlled Synthesis of Uniform Lanthanide‐Doped NaGdF4 Upconversion Nanocrystals Via an OA/Ionic Liquid Two‐Phase System for In Vivo Dual‐Modality Imaging , 2011 .

[493]  Yadong Li,et al.  Na(Y1.5 Na0.5)F6 single-crystal nanorods as multicolor luminescent materials. , 2006, Nano letters.

[494]  Lisha Zhang,et al.  980‐nm Laser‐Driven Photovoltaic Cells Based on Rare‐Earth Up‐Converting Phosphors for Biomedical Applications , 2009 .

[495]  Qian Liu,et al.  Iridium(III) complex-coated nanosystem for ratiometric upconversion luminescence bioimaging of cyanide anions. , 2011, Journal of the American Chemical Society.

[496]  W. Fann,et al.  White-light emission from an upconverted emission with an organic triplet sensitizer. , 2009, Chemical communications.

[497]  P. E. Keivanidis,et al.  Up‐Conversion Photoluminescence in Polyfluorene Doped with Metal(II)–Octaethyl Porphyrins , 2003 .

[498]  Chunhua Yan,et al.  Luminescent rare earth nanomaterials for bioprobe applications. , 2008, Dalton transactions.

[499]  Meng Wang,et al.  Immunolabeling and NIR-excited fluorescent imaging of HeLa cells by using NaYF(4):Yb,Er upconversion nanoparticles. , 2009, ACS nano.

[500]  Jianzhang Zhao,et al.  Green light-excitable naphthalenediimide acetylide-containing cyclometalated Ir(III) complex with long-lived triplet excited states as triplet photosensitizers for triplet-triplet annihilation upconversion. , 2013, Dalton transactions.

[501]  Tymish Y. Ohulchanskyy,et al.  Combined Optical and MR Bioimaging Using Rare Earth Ion Doped NaYF4 Nanocrystals , 2009 .

[502]  Francisco Sanz-Rodríguez,et al.  Temperature sensing using fluorescent nanothermometers. , 2010, ACS nano.

[503]  Jianzhang Zhao,et al.  Long-lived room-temperature deep-red-emissive intraligand triplet excited state of naphthalimide in cyclometalated Ir(III) complexes and its application in triplet-triplet annihilation-based upconversion. , 2012, Chemistry.

[504]  Xueyuan Chen,et al.  Upconversion nanoparticles in biological labeling, imaging, and therapy. , 2010, The Analyst.

[505]  Chun-Hua Yan,et al.  Luminescent Monodisperse Nanocrystals of Lanthanide Oxyfluorides Synthesized from Trifluoroacetate Precursors in High-Boiling Solvents , 2008 .

[506]  Roberto Simonutti,et al.  High Efficiency Up‐Converting Single Phase Elastomers for Photon Managing Applications , 2013 .

[507]  B. Judd,et al.  OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS , 1962 .

[508]  Jan C. Hummelen,et al.  Broadband dye-sensitized upconversion of near-infrared light , 2012, Nature Photonics.

[509]  Shaomin Ji,et al.  Efficient Triplet–Triplet Annihilation Upconversion with Platinum(II) Bis(arylacetylide) Complexes That Show Long‐Lived Triplet Excited States , 2012 .

[510]  Chunhua Yan,et al.  Synthesis and assembly of rare earth nanostructures directed by the principle of coordination chemistry in solution-based process , 2010 .

[511]  G. S. Ofelt.  Intensities of Crystal Spectra of Rare‐Earth Ions , 1962 .

[512]  Yong Zhang,et al.  Nanoparticles in photodynamic therapy: an emerging paradigm. , 2008, Advanced drug delivery reviews.

[513]  D. Gamelin,et al.  Two-Photon Spectroscopy of d3 Transition Metals: Near-IR-to-Visible Upconversion Luminescence by Re4+ and Mo3+ , 1998 .

[514]  Andrei V. Cheprakov,et al.  Upconversion with ultrabroad excitation band: Simultaneous use of two sensitizers , 2007 .

[515]  Gang Han,et al.  Controlled synthesis and single-particle imaging of bright, sub-10 nm lanthanide-doped upconverting nanocrystals. , 2012, ACS nano.

[516]  Yadong Li,et al.  Upconversion luminescence of monodisperse CaF2:Yb(3+)/Er(3+) nanocrystals. , 2009, Journal of the American Chemical Society.

[517]  Kai Yang,et al.  Facile preparation of multifunctional upconversion nanoprobes for multimodal imaging and dual-targeted photothermal therapy. , 2011, Angewandte Chemie.

[518]  Xun Wang,et al.  Monodisperse nanocrystals: general synthesis, assembly, and their applications. , 2007, Chemical communications.

[519]  Y. Murakami.  Photochemical photon upconverters with ionic liquids , 2011, 1106.4172.

[520]  Wei Feng,et al.  Cubic sub-20 nm NaLuF(4)-based upconversion nanophosphors for high-contrast bioimaging in different animal species. , 2012, Biomaterials.

[521]  A. Speghini,et al.  NIR-to-visible and NIR-to-NIR upconversion in lanthanide doped nanocrystalline GdOF with trigonal structure , 2011 .

[522]  M. Tan,et al.  Comprehensive Study on the Size Effects of the Optical Properties of NaYF4:Yb,Er Nanocrystals , 2013 .

[523]  Yong Zhang,et al.  Upconversion nanoparticles for sensitive and in-depth detection of Cu2+ ions. , 2012, Nanoscale.

[524]  Application of NaYF4:Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors , 2007 .

[525]  P. Choyke,et al.  New strategies for fluorescent probe design in medical diagnostic imaging. , 2010, Chemical reviews.

[526]  Kai Yang,et al.  Highly-sensitive multiplexed in vivo imaging using pegylated upconversion nanoparticles , 2010 .

[527]  G. Chow,et al.  The effects of surface and surface coatings on fluorescence properties of hollow NaYF_4:Yb,Er upconversion nanoparticles , 2011 .

[528]  F. Castellano,et al.  Supermolecular-chromophore-sensitized near-infrared-to-visible photon upconversion. , 2010, Journal of the American Chemical Society.

[529]  F. V. van Veggel,et al.  Hard proof of the NaYF(4)/NaGdF(4) nanocrystal core/shell structure. , 2009, Journal of the American Chemical Society.

[530]  O. Wolfbeis,et al.  Optical ammonia sensor based on upconverting luminescent nanoparticles. , 2010, Analytical chemistry.

[531]  Gihan S Joshua,et al.  Control of Green and Red Upconversion in NaYF4:Yb3+,Er3+ Nanoparticles by Excitation Modulation. , 2011, Journal of materials chemistry.

[532]  Kazuo Tanaka,et al.  Hypoxic condition-selective upconversion via triplet-triplet annihilation based on POSS-core dendrimer complexes. , 2013, Bioorganic & medicinal chemistry.

[533]  Wei Feng,et al.  Gd3+ complex-modified NaLuF4-based upconversion nanophosphors for trimodality imaging of NIR-to-NIR upconversion luminescence, X-Ray computed tomography and magnetic resonance. , 2012, Biomaterials.

[534]  K. Ghiggino,et al.  Photon Upconversion by Triplet-Triplet Annihilation in Ru(bpy)(3)- and DPA-Functionalized Polymers , 2013 .

[535]  F. V. Veggel,et al.  Analysis of the Shell Thickness Distribution on NaYF4/NaGdF4 Core/Shell Nanocrystals by EELS and EDS , 2011 .

[536]  Manoj Kumar,et al.  Highly sensitive and selective label-free optical detection of DNA hybridization based on photon upconverting nanoparticles. , 2009, Langmuir : the ACS journal of surfaces and colloids.

[537]  Yongsheng Liu,et al.  Er3+ -doped anatase TiO2 nanocrystals: crystal-field levels, excited-state dynamics, upconversion, and defect luminescence. , 2011, Small.

[538]  Christopher G. Morgan,et al.  The Active‐Core/Active‐Shell Approach: A Strategy to Enhance the Upconversion Luminescence in Lanthanide‐Doped Nanoparticles , 2009 .

[539]  J. Callis,et al.  Luminescent barometry in wind tunnels , 1990 .

[540]  T. Hyeon,et al.  Comparative Study of Upconverting Nanoparticles with Various Crystal Structures, Core/Shell Structures, and Surface Characteristics , 2013 .

[541]  Jianhua Hao,et al.  Dual-modal upconversion fluorescent/X-ray imaging using ligand-free hexagonal phase NaLuF4:Gd/Yb/Er nanorods for blood vessel visualization. , 2014, Biomaterials.

[542]  Jianzhang Zhao,et al.  Fluorene as π-conjugation linker in N^N Pt(II) bisacetylide complexes and their applications for triplet–triplet annihilation based upconversion , 2012 .

[543]  Yuan Gao,et al.  A facile method to synthesize superparamagnetic and up-conversion luminescent NaYF4:Yb, Er/Tm@SiO2@Fe3O4 nanocomposite particles and their bioapplication , 2011 .

[544]  Tero Soukka,et al.  Tandem dye acceptor used to enhance upconversion fluorescence resonance energy transfer in homogeneous assays. , 2007, Analytical chemistry.

[545]  Qiang Zhao,et al.  Phosphorescent heavy-metal complexes for bioimaging. , 2011, Chemical Society reviews.

[546]  Wei Feng,et al.  A cyanine-modified nanosystem for in vivo upconversion luminescence bioimaging of methylmercury. , 2013, Journal of the American Chemical Society.

[547]  D. Zhao,et al.  Rare-earth upconverting nanobarcodes for multiplexed biological detection. , 2011, Small.

[548]  Chun-Hua Yan,et al.  Biocompatible Bright YVO4:Eu Nanoparticles as Versatile Optical Bioprobes , 2010 .

[549]  Yong Zhang,et al.  Upconversion fluorescence imaging of cells and small animals using lanthanide doped nanocrystals. , 2008, Biomaterials.

[550]  Jicun Ren,et al.  Sensitive determination of chromium (VI) based on the inner filter effect of upconversion luminescent nanoparticles (NaYF4:Yb3+, Er3+). , 2012, Talanta.

[551]  Xiaohong Yan,et al.  Thermal loading induced near-infrared broadband upconversion emission of Sm3+-doped β-NaYbF4 nano-phosphors , 2011 .

[552]  G. Chow,et al.  Colloidal LaF3:Yb,Er, LaF3:Yb,Ho and LaF3:Yb,Tm nanocrystals with multicolor upconversion fluorescence , 2005 .

[553]  Fuyou Li,et al.  Versatile synthesis strategy for carboxylic acid-functionalized upconverting nanophosphors as biological labels. , 2008, Journal of the American Chemical Society.

[554]  Lanlan Zhong,et al.  Enhancement of Near-Infrared-to-Visible Upconversion Luminescence Using Engineered Plasmonic Gold Surfaces , 2011 .

[555]  Xiaogang Qu,et al.  Long-circulating Er3+-doped Yb2O3 up-conversion nanoparticle as an in vivo X-Ray CT imaging contrast agent. , 2012, Biomaterials.

[556]  Qian Liu,et al.  "Drawing" upconversion nanophosphors into water through host-guest interaction. , 2010, Chemical communications.

[557]  Chuanbin Mao,et al.  NIR-responsive silica-coated NaYbF(4):Er/Tm/Ho upconversion fluorescent nanoparticles with tunable emission colors and their applications in immunolabeling and fluorescent imaging of cancer cells. , 2009, The journal of physical chemistry. C, Nanomaterials and interfaces.

[558]  C. S. Lim,et al.  Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping , 2010, Nature.

[559]  F. Vetrone,et al.  Enhancing upconverted white light in Tm3+/Yb3+/Ho3+-doped GdVO4 nanocrystals via incorporation of Li+ ions. , 2012, Optics express.

[560]  Jianan Liu,et al.  NIR-triggered anticancer drug delivery by upconverting nanoparticles with integrated azobenzene-modified mesoporous silica. , 2013, Angewandte Chemie.

[561]  Raymond Ziessel,et al.  Boron dipyrromethene chromophores: next generation triplet acceptors/annihilators for low power upconversion schemes. , 2008, Journal of the American Chemical Society.

[562]  Lun Wang,et al.  An efficient upconversion luminescence energy transfer system for determination of trace amounts of nitrite based on NaYF4:Yb3+, Er3+ as donor. , 2012, Analytica chimica acta.

[563]  F. Huang,et al.  Phase transition from hexagonal LnF3 (Ln = La, Ce, Pr) to cubic Ln0.8M0.2F2.8 (M = Ca, Sr, Ba) nanocrystals with enhanced upconversion induced by alkaline-earth doping. , 2011, Chemical communications.

[564]  Wei Feng,et al.  Iridium‐Complex‐Modified Upconversion Nanophosphors for Effective LRET Detection of Cyanide Anions in Pure Water , 2012 .

[565]  Qing Peng,et al.  A general strategy for nanocrystal synthesis , 2005, Nature.

[566]  Juan Wang,et al.  Direct evidence of a surface quenching effect on size-dependent luminescence of upconversion nanoparticles. , 2010, Angewandte Chemie.

[567]  Chunya Li,et al.  Upconversion fluorescence resonance energy transfer based biosensor for ultrasensitive detection of matrix metalloproteinase-2 in blood. , 2012, Analytical chemistry.

[568]  P. E. Keivanidis,et al.  Inherent photon energy recycling effects in the up-converted delayed luminescence dynamics of poly(fluorene)-Pt(II)octaethyl porphyrin blends. , 2009, Chemphyschem : a European journal of chemical physics and physical chemistry.

[569]  Yangyang He,et al.  Temperature Sensing and In Vivo Imaging by Molybdenum Sensitized Visible Upconversion Luminescence of Rare‐Earth Oxides , 2012, Advanced materials.

[570]  S. Oishi,et al.  Novel fabrication of NIR-vis upconversion NaYF4:Ln (Ln = Yb, Er, Tm) crystal layers by a flux coating method , 2011 .

[571]  Chenghui Liu,et al.  Morphology- and phase-controlled synthesis of monodisperse lanthanide-doped NaGdF4nanocrystals with multicolor photoluminescence , 2009 .

[572]  Qian Liu,et al.  A general strategy for biocompatible, high-effective upconversion nanocapsules based on triplet-triplet annihilation. , 2013, Journal of the American Chemical Society.

[573]  F. V. van Veggel,et al.  Silica-coated Ln3+-Doped LaF3 nanoparticles as robust down- and upconverting biolabels. , 2006, Chemistry.

[574]  Flora L Thorp-Greenwood,et al.  Application of d6 transition metal complexes in fluorescence cell imaging. , 2010, Chemical communications.

[575]  J. M. Gardner,et al.  Anchoring Energy Acceptors to Nanostructured ZrO2 Enhances Photon Upconversion by Sensitized Triplet–Triplet Annihilation Under Simulated Solar Flux , 2013 .