Synthesis and spectrum stability of high quality CdTe quantum dots capped with stearate groups in N-oleoylmorpholine solvent

被引：13
作者：
Liu, Xinmei [1 ,2 ]
Jiang, Yang [1 ]
Wang, Chun [1 ]
Li, Shanying [1 ]
Lan, Xinzheng [1 ]
Chen, Yan [1 ]
Zhong, Honghai [1 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China
[2] Guangxi Univ Technol, Dept Biol & Chem Engn, Liuzhou 545006, Guangxi, Peoples R China
来源：
JOURNAL OF CRYSTAL GROWTH | 2010年 / 312卷 / 19期
基金：
国家高技术研究发展计划(863计划);
关键词：
Low dimensional structures; Solvent; Tellurites; Semiconducting II - VI materials; SURFACE MODIFICATION; CDS NANOCRYSTALS; NANOPARTICLES; LUMINESCENT; PRECURSOR; GROWTH; PHOTOLUMINESCENCE; FILMS; SE;
D O I：
10.1016/j.jcrysgro.2010.06.009
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The stearate-capped CdTe quantum dots (QDs) have been first prepared via direct reaction of cadmium stearate with Te powder in N-oleoylmorpholine solvent, which was a kind of clean, air-stable and conveniently synthesized acylamide, and can readily dissolve precursors cadmium stearate and Te powder at a relative low temperature. The as-prepared CdTe QDs exhibited size-dependent optical properties, steep absorbance edge and narrow photoluminescence full width at half maximum. The high-resolution transmission electron microscopy images and X-ray diffraction revealed that the highly monodisperse CdTe QDs were of regular spherical morphology with zinc blende crystal structure displaying mean sizes of about 4 nm. The energy dispersed spectrometry measurement indicated the presence of Cd and Te, with the Cd:Te ratio being close to 1:1. Fourier transform infrared transmission spectra confirmed the existence of stearate on the CdTe QDs surfaces. The experimental results also demonstrated that the stearate-capped CdTe QDs had an unexpected good stability. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：2656 / 2660
页数：5
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