Study on the optical properties of CdSe QDs with different ligands in specific matrix

被引：13
|
作者：
Lin, Wei [1 ]
Zou, Wei [1 ]
Du, Zhongjie [1 ]
Li, Hangquan [1 ]
Zhang, Chen [1 ]
机构：
[1] Beijing Univ Chem Technol, Minist Educ, Key Lab Carbon Fiber & Funct Polymers, Beijing 100029, Peoples R China
来源：
JOURNAL OF NANOPARTICLE RESEARCH | 2013年 / 15卷 / 05期
基金：
中国国家自然科学基金;
关键词：
CdSe quantum dot; Ligand; Thioglycolic acid; Diamine; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; ELECTRONIC-STRUCTURE; SURFACE; NANOCLUSTERS; LUMINESCENCE; RELAXATION; EFFICIENCY; CHEMISTRY; PH;
D O I：
10.1007/s11051-013-1629-y
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Different ligand structures of CdSe quantum dots were designed and synthesized for the specific matrix and the effect of the ligands on the photoluminescence and optical properties were further investigated. Ligand exchange reaction was used to synthesize thioglycolic acid-capped CdSe QDs and the process was characterized by FT-IR and titration. The influence of environmental pH value and storing time on the properties of thioglycolic acid-capped CdSe QDs in aqueous solution were studied by absorption and photoluminescence spectra. It was found that alkaline environment was more beneficial for the application of CdSe QDs. Therefore, the amino ligands with different molecular weight were grafted onto CdSe QDs for improving the compatibility with epoxy matrix and then amino-capped CdSe QDs/epoxy nanocomposites were fabricated. The morphologies and properties of the nanocomposites were characterized by DLS, HR-TEM, UV-Vis spectra, and photoluminescence spectra. As a result, amino ligands with short-molecular chain-capped CdSe QDs/epoxy nanocomposites exhibited good dispersion, high transparency and photoluminescence, and would be suitable for potential application in light-emitting diode device.
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页数：10
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