Controllable synthesis of functionalized CdS nanocrystals and CdS/PMMA nanocomposite hybrids

被引：65

作者：

Chen, Li ^{[1
]}

Zhu, Jia ^{[1
]}

Li, Qing ^{[1
]}

Chen, Su ^{[1
]}

Wang, Yanru ^{[1
]}

机构：

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

来源：

EUROPEAN POLYMER JOURNAL | 2007年 / 43卷 / 11期

基金：

中国国家自然科学基金;

关键词：

CdS nanocrystal; quantum dot; CdS-PMMA nanocomposite; optical properties;

D O I：

10.1016/j.eurpolymj.2007.08.008

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We reported controllable synthesis of US nanocrystal-polymer transparent hybrids by using polymethylmethacrylate (PMMA) as a polymer matrix. In a typical run, the appropriate amounts of cadmium chloride (CdCl2) and sodium sulfide (Na2S) in the presence of 2-mercaptoethanol (ME) as the organic ligand are well dispersed in H2O/DMF solution without any aggregation. From a combination of transmission electron microscopy (TEM) and a computing method of Brus's model according UV-vis absorption spectra, the particle size of as-prepared hydroxyl-coated US nanocrystal was determined to be about 5 nm. Then, with the surface treatment with methacryloxypropyltrimethoxysilane (MPS), CdS-PMMA hybrids were obtained via free radical polymerization in situ. FT-IR characterization indicates the formation of robust bonding between CdS nanocrystals and the organic ligand and the formation of double-bond functional US nanocrystals. The TGA measurement displays CdS-PMMA hybrids possess better thermal stability compared with pure PMMA polymer. The fluorescence measurement shows that US nanocrystals and CdS-PMMA hybrids exhibit good optical properties. Also, the luminescent photographs taken under ultraviolet light prove the luminescence properties. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4593 / 4601

页数：9

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