Controllable synthesis of water-soluble luminescent CdxZn1-xS nanocrystals

被引：23

作者：

Zhu, Jia ^{[1
]}

Zhang, Junhao ^{[1
]}

Zhen, Jiangbo ^{[1
]}

Chen, Chuanxiang ^{[1
]}

Lu, Jun ^{[1
]}

Chen, Su ^{[2
]}

机构：

[1] Jiangsu Univ Sci & Technol, Coll Mat Sci & Engn, Zhenjiang 212003, Peoples R China

[2] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 16期

关键词：

CdxZn1-xS; Nanocrystals; UV-vis spectra; Photoluminescence; QUANTUM DOTS; SEMICONDUCTOR CLUSTERS; ZNS; CDS; PHOTOLUMINESCENCE; TEMPERATURE; NANOPARTICLES; PARTICLES; STABILITY; MECHANISM;

D O I：

10.1016/j.physb.2010.05.022

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Multicolored luminescent CdxZn1-xS nanocrystals in aqueous solution have been controllably synthesized with thioglycollic acid (TGA) as a surface modifier. The CdxZn1-xS nanocrystals were characterized by X-ray diffraction (XRD) patterns, transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FT-IR) spectrum, ultraviolet-visible (UV-vis) spectra, and photoluminescence (PL) spectra. From a combination of TEM data and computing methods according to UV-vis spectra and XRD patterns, the particle size of CdS nanocrystal was found to be about 4 nm. Homogeneous CdxZn1-xS nanocrystals have the same well-crystallized cubic lattice structure. FT-IR spectrum indicates that the carboxyl group of TGA is coated on the surface of nanocrystals successfully. The composition dependent UV-vis and PL spectra reveal that the series CdxZn1-xS nanocrystals exhibit good optical properties, which can be modulated by changing the cation molar ratio of Zn:Cd in the reactants. The green and yellow luminescence of CdxZn1-xS nanocrystals is brightly eye-viewable under UV irradiation. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3452 / 3457

页数：6

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