文献类型：期刊文献

英文题名：Effect of the spherical silica surface on the photoluminescence of the loaded CdS nanoparticles

作者：Kang, Shi-Zhao[1]; Yang, Yikai[1]; Xu, Zhizhen[1]; Mu, Jin[1]

机构：[1] Department of Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, China

年份：2008

卷号：29

期号：4

起止页码：521

外文期刊名：Journal of Dispersion Science and Technology

收录：EI(收录号：20081611201527)

语种：英文

外文关键词：Energy dispersive spectroscopy - Fluorescence spectroscopy - High resolution transmission electron microscopy - Microspheres - Nanoparticles - Photoluminescence - Silica - Ultraviolet spectroscopy

摘要：CdS nanoparticles were formed on the surface of silica microspheres by the improved layer-by-layer self-assembled technique. High-resolution electron microscope (HRTEM) image and energy dispersive x-ray analysis (EDX) confirmed formation of a quasi-continuous CdS nanoparticles film on the silica microspheres. The results of UV-vis and fluorescence spectra display that the spherical silica surface has a great effect on the photoluminescence of the loaded CdS nanoparticles. In contrast to the CdS nanoparticles powder, the composite can exhibit the emission ascribed to the band gap transition when the CdS nanoparticles film is relatively thick. This phenomenon is probably due to an enhancement of the crystallinity of CdS nanoparticles induced by the silica spheres.