Study on the fluorescence characteristics of carbon dots.

Herein, we prepared water-soluble fluorescent carbon dots with diameter about 1.5 nm from cheap commercial lampblack. These fluorescent carbon nanoparticles are stable toward photobleaching and stable in water for more than half a year without fluorescence decrease. In order to improve its fluorescence properties, we passivated these nanoparticles with bisamino-terminated polyethylene glycol (PEG(1500 N)). Therefore, both fluorescence quantum yield and lifetime increased after this progress. In addition, the passivated carbon dots were more inert to solvent than the bare one and showed different responses to pH change.

[1]  Tsukasa Torimoto,et al.  Facile synthesis of ZnS-AgInS2 solid solution nanoparticles for a color-adjustable luminophore. , 2007, Journal of the American Chemical Society.

[2]  Igor L. Medintz,et al.  Fluorescence resonance energy transfer between quantum dot donors and dye-labeled protein acceptors. , 2003, Journal of the American Chemical Society.

[3]  Moungi G Bawendi,et al.  Compact biocompatible quantum dots functionalized for cellular imaging. , 2008, Journal of the American Chemical Society.

[4]  D. Pang,et al.  Luminescent CdSe-ZnS quantum dots as selective Cu2+ probe , 2004 .

[5]  Dale M. Willard,et al.  CdSe−ZnS Quantum Dots as Resonance Energy Transfer Donors in a Model Protein−Protein Binding Assay , 2001 .

[6]  R. Li,et al.  An electrochemical avenue to blue luminescent nanocrystals from multiwalled carbon nanotubes (MWCNTs). , 2007, Journal of the American Chemical Society.

[7]  J. Lakowicz.  Principles of fluorescence spectroscopy , 1983 .

[8]  Yunsheng Xia,et al.  Two distinct photoluminescence responses of CdTe quantum dots to Ag (I) , 2008 .

[9]  C. Balasubramanian,et al.  Isolation and characterization of fluorescent nanoparticles from pristine and oxidized electric arc-produced single-walled carbon nanotubes. , 2006, The journal of physical chemistry. B.

[10]  Latha A. Gearheart,et al.  Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments. , 2004, Journal of the American Chemical Society.

[11]  Chang-qing Zhu,et al.  Functionalized cadmium sulfide quantum dots as fluorescence probe for silver ion determination , 2005 .

[12]  Ya‐Ping Sun,et al.  Carbon dots for multiphoton bioimaging. , 2007, Journal of the American Chemical Society.

[13]  M. Politi,et al.  Energy transfer between CdSe/ZnS core/shell quantum dots and fluorescent proteins. , 2007, Bioconjugate chemistry.

[14]  S. Nie,et al.  Quantum dot bioconjugates for ultrasensitive nonisotopic detection. , 1998, Science.

[15]  C. Mao,et al.  Fluorescent carbon nanoparticles derived from candle soot. , 2007, Angewandte Chemie.

[16]  D. Pang,et al.  The biocompatibility of quantum dot probes used for the targeted imaging of hepatocellular carcinoma metastasis. , 2008, Biomaterials.

[17]  E. Giannelis,et al.  Photoluminescent Carbogenic Dots , 2008 .

[18]  Yi Lin,et al.  Functionalized carbon nanotubes: properties and applications. , 2002, Accounts of chemical research.

[19]  Ya‐Ping Sun,et al.  Quantum-sized carbon dots for bright and colorful photoluminescence. , 2006, Journal of the American Chemical Society.

[20]  Brendan D. McKay,et al.  A universal set of growth operations for fullerenes , 2008 .

[21]  Eunkeu Oh,et al.  Inhibition assay of biomolecules based on fluorescence resonance energy transfer (FRET) between quantum dots and gold nanoparticles. , 2005, Journal of the American Chemical Society.

[22]  Yan Zhang,et al.  l-Carnitine capped quantum dots as luminescent probes for cadmium ions , 2007 .

[23]  E. Giannelis,et al.  Surface functionalized carbogenic quantum dots. , 2008, Small.

[24]  Enoch Kim,et al.  Specific and covalent labeling of a membrane protein with organic fluorochromes and quantum dots , 2007, Proceedings of the National Academy of Sciences.

[25]  Hsiao-Yun Wu,et al.  Characterization and application of single fluorescent nanodiamonds as cellular biomarkers , 2007, Proceedings of the National Academy of Sciences.

[26]  Yi Zhang,et al.  Preparation, characterization and evaluation of water-soluble l-cysteine-capped-CdS nanoparticles as fluorescence probe for detection of Hg(II) in aqueous solution , 2006 .

[27]  Nastassja A. Lewinski,et al.  Cytotoxicity of nanoparticles. , 2008, Small.

[28]  W. Tan,et al.  Ultrafine biocompatible chitosan nanoparticles encapsulating multi-coloured quantum dots for bioapplications. , 2007, Journal of colloid and interface science.

[29]  Ya‐Ping Sun,et al.  Solubilization of Single-Walled Carbon Nanotubes with Diamine-Terminated Oligomeric Poly(ethylene Glycol) in Different Functionalization Reactions , 2003 .

[30]  Jason E. Riggs,et al.  Optical limiting properties of suspended and solubilized carbon nanotubes , 2000 .

[31]  Jason E. Riggs,et al.  Strong Luminescence of Solubilized Carbon Nanotubes , 2000 .

[32]  J. Matthew Mauro,et al.  Self-Assembly of CdSe−ZnS Quantum Dot Bioconjugates Using an Engineered Recombinant Protein , 2000 .

[33]  J. Post,et al.  Quantum dot ligands provide new insights into erbB/HER receptor–mediated signal transduction , 2004, Nature Biotechnology.

[34]  S. Pathak,et al.  Hydroxylated quantum dots as luminescent probes for in situ hybridization. , 2001, Journal of the American Chemical Society.