Synthesis and tailoring of CdSe core@shell heterostructures for optical applications

The successive ion layer deposition reaction (SILAR) technique has been applied to CdSe based systems to develop Type 1 heterostructures . In such structures, the CdSe core is covered by wider band gap semicondutors to improve the emission properties. Cores of different dimensions has been synthesised and two different shell structures have been addressed. The obtained particles have been characterised by TEM technique, while UV-Vis absorption and photoemission spectroscopy were used to characterise the optical properties of the particles in the colloidal solution. The obtained particles were also introduced in a ZrO2 sol-gel matrix to fabricate photoluminescent waveguides, which were characterised also by spectroscopic ellipsometry.

[1]  Hiroyuki Uchida,et al.  Optical properties of gallium arsenide nanocrystals , 1992 .

[2]  W. Webb,et al.  Water-Soluble Quantum Dots for Multiphoton Fluorescence Imaging in Vivo , 2003, Science.

[3]  Xiaogang Peng,et al.  Green Chemical Approaches Toward High-Quality Semiconductor Nanocrystals , 2002 .

[4]  G. Konstantatos,et al.  Ultrasensitive solution-cast quantum dot photodetectors , 2006, Nature.

[5]  Xiaogang Peng,et al.  Formation of high-quality CdS and other II-VI semiconductor nanocrystals in noncoordinating solvents: tunable reactivity of monomers. , 2002, Angewandte Chemie.

[6]  A. Malko,et al.  Optical gain and stimulated emission in nanocrystal quantum dots. , 2000, Science.

[7]  Valery Shklover,et al.  Quantum size effects in nanocrystalline semiconducting titania layers prepared by anodic oxidative hydrolysis of titanium trichloride , 1993 .

[8]  A. Alivisatos,et al.  Organometallic Synthesis of GaAs Crystallites Exhibiting Quantum Confinement , 1990 .

[9]  Uri Banin,et al.  Lasing from Semiconductor Quantum Rods in a Cylindrical Microcavity , 2002 .

[10]  Alessandro Martucci,et al.  Highly Efficient Amplified Stimulated Emission from CdSe‐CdS‐ZnS Quantum Dot Doped Waveguides with Two‐Photon Infrared Optical Pumping , 2008 .

[11]  S. Nie,et al.  In vivo cancer targeting and imaging with semiconductor quantum dots , 2004, Nature Biotechnology.

[12]  Xiaogang Peng,et al.  Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor. , 2001, Journal of the American Chemical Society.

[13]  Xiaogang Peng,et al.  Alternative Routes toward High Quality CdSe Nanocrystals , 2001 .

[14]  Xiaogang Peng,et al.  Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals , 2003 .

[15]  Alf Mews,et al.  Synthesis and Characterization of Highly Luminescent CdSe—Core CdS/Zn0.5Cd0.5S/ZnS Multishell Nanocrystals. , 2005 .

[16]  Xiaogang Peng,et al.  Control of photoluminescence properties of CdSe nanocrystals in growth. , 2002, Journal of the American Chemical Society.

[17]  Alessandro Martucci,et al.  Sol–Gel Based Vertical Optical Microcavities with Quantum Dot Defect Layers , 2008 .

[18]  Louis E. Brus,et al.  Semiconductor crystallites: a class of large molecules , 1990 .

[19]  Arthur J. Nozik,et al.  Synthesis and Characterization of InP Quantum Dots. , 1994 .

[20]  Donald Fitzmaurice,et al.  Preparation and spectroscopic characterization of highly confined nanocrystallites of gallium arsenide in decane , 1993 .

[21]  Matthew B. Johnson,et al.  Large-scale synthesis of nearly monodisperse CdSe/CdS core/shell nanocrystals using air-stable reagents via successive ion layer adsorption and reaction. , 2003, Journal of the American Chemical Society.

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

[23]  Neerish Revaprasadu,et al.  Air-stable single-source precursors for the synthesis of chalcogenide semiconductor nanoparticles , 2001 .

[24]  Eiji Ohtani,et al.  Electroluminescence from single monolayers of nanocrystals in molecular organic devices , 2022 .

[25]  Itamar Willner,et al.  Photosensitization of Quantum-Size TiO2 Particles in Water-in-Oil Microemulsions , 1994 .

[26]  John E. Bonevich,et al.  GROWTH KINETICS OF NANOCRYSTALLINE ZNO PARTICLES FROM COLLOIDAL SUSPENSIONS , 1998 .

[27]  Darrick J. Williams,et al.  Utilizing the lability of lead selenide to produce heterostructured nanocrystals with bright, stable infrared emission. , 2008, Journal of the American Chemical Society.

[28]  Paul Mulvaney,et al.  Nucleation and growth of CdSe nanocrystals in a binary ligand system. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[29]  A. Alivisatos,et al.  Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer , 1994, Nature.

[30]  Hiroyuki Uchida,et al.  Gallium arsenide nanocrystals prepared in quinoline , 1991 .

[31]  Paul Mulvaney,et al.  Mapping the optical properties of CdSe/CdS heterostructure nanocrystals: the effects of core size and shell thickness. , 2009, Journal of the American Chemical Society.

[32]  D. Balding,et al.  HLA Sequence Polymorphism and the Origin of Humans , 2006 .

[33]  Vikram C. Sundar,et al.  Color-selective semiconductor nanocrystal laser , 2002 .