Surface modification and particles size distribution control in nano-CdS/polystyrene composite film

被引：37

作者：

Rong, MZ ^{[1
]}

Zhang, MQ ^{[1
]}

Liang, HC ^{[1
]}

Zeng, HM ^{[1
]}

机构：

[1] Zhongshan Univ, Inst Mat Sci, Key Lab Polymer Composite & Funct Mat, Minist Educ, Guangzhou 510275, Peoples R China

来源：

CHEMICAL PHYSICS | 2003年 / 286卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

surface modification of nanoparticles; modifier morphologies; polymeric nanocomposites; optical performance;

D O I：

10.1016/S0301-0104(02)00928-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Preparation of nano-CdS particles with surface thiol modification by microemulsion method and their influences on the particle size distribution in highly filled polystyrene-based composites were studied. The modified nano-CdS was characterized by X-ray photoelectron spectroscopy (XPS), light absorption and emission measurements to reveal the morphologies of the surface modifier, which are consistent with the surface molecules packing calculation. The morphologies of the surface modifier exerted a great influence not only on the optical performance of the particles themselves, but also on the size distribution of the particle in polystyrene matrix. A monolayer coverage with tightly packed thiol molecules was believed to be most effective in promoting a uniform particle size distribution and eliminating the surface defects that cause radiationless recombination. Control of the particles size distribution in polystyrene can be attained by adjusting surface coverage status of the thiol molecules based on the strong interaction between the surface modifier and the matrix. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：267 / 276

页数：10

共 26 条

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