The influence of capping thioalkyl acid on the growth and photoluminescence efficiency of CdTe and CdSe quantum dots

被引：61

作者：

Aldeek, Fadi ^{[1
,2
]}

Balan, Lavinia ^{[3
]}

Lambert, Jacques ^{[2
]}

Schneider, Raphaeel ^{[1
]}

机构：

[1] Nancy Univ, CNRS, Dept Chim Phys React, F-54001 Nancy, France

[2] Nancy Univ, CNRS, Lab Chim Phys & Microbiol Environm, F-54600 Villers Les Nancy, France

[3] Univ Haute Alsace, ENSCMu, CNRS, UMR 7525,Dept Photochim Gen, F-68093 Mulhouse, France

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 47期

关键词：

D O I：

10.1088/0957-4484/19/47/475401

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of thioalkyl acid ligand was evaluated during aqueous synthesis at 100 degrees C and under hydrothermal conditions (150 degrees C) of CdTe and CdSe quantum dots (QDs). Experiments performed with 3-mercaptopropionic acid (MPA), 6-mercaptohexanoic acid (MHA) and 11-mercaptoundecanoic acid (MUA) demonstrated that the use of MHA and MUA allowed for the preparation of very small nanoparticles (0.6-2.5 nm) in carrying out the reaction under atmospheric pressure or in an autoclave and that the photophysical properties of QDs were dependent on the ligand and on the synthesis conditions. The influence of various experimental conditions, including the Te-to-Cd ratio, temperature, and precursor concentration, on the growth rate of CdTe or CdSe QDs has been systematically investigated. The fluorescence intensities of CdTe QDs capped with MPA, MHA, or MUA versus pH were also found to be related to the surface coverage of the nanoparticles.

引用

页数：9

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