Structural and optical characterization of CdS nanoparticles prepared by chemical precipitation method

被引：154
|
作者：
Singh, Vineet [1 ]
Chauhan, Pratima [1 ]
机构：
[1] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2009年 / 70卷 / 07期
关键词：
Nanostructures; Semiconductors; Chemical synthesis; X-ray diffraction; Optical properties; PHOTOLUMINESCENCE; CRYSTALLITES; ELECTRON; RAMAN;
D O I：
10.1016/j.jpcs.2009.05.024
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In the present study we have synthesized CdS semiconducting quantum dots by the chemical precipitation method using Thioglycerol as the capping agent. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) are employed to characterize the size, morphology and crystalline structure of the as-prepared material. The synthesized QPs have a mixture of cubical and hexagonal crystal symmetry with 12 nm average diameter. Ultraviolet-visible (UV-vis) absorption spectroscopy is used to calculate the band gap of the material and blue shift in absorption edge. Confinement of the optical phonon modes in the QPs is studied by Raman spectroscopy, while FTIR for identification of chemical bonds in the nanomaterial. Multiple cadmium and sulphur defects were observed by employing the photoluminescence (PL) method. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1074 / 1079
页数：6
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