Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (05): 477-480.doi: 10.3866/PKU.WHXB20020520

• Note • Previous Articles    

Synthesis and Photoluminescent Properties of CdS/SiO2 Nanorod

Kuang Han-Mao;Deng Zhao-Xiang;Li Chun-Hui;Sun Xiao-Ming;Zhuang Jing;Li Ya-Dong   

  1. Department of Chemistry, Tsinghua University, Beijing 100084;Department of Chemistry, Jinggangshan Normal College, Jian 343009
  • Received:2001-09-12 Revised:2002-01-09 Published:2002-05-15
  • Contact: Li Ya-Dong E-mail:ydli@tsinghua.edu.cn

Abstract: Core/shell structures of CdS/SiO2 were synthesized through the ammonium hydroxide catalyzed hydrolysis of tetraethylorthosilicate(TEOS) in alcohol media containing presynthesized CdS nanorods. Xray diffraction(XRD), transmission electron microscopy(TEM), UVVis spectroscopy and photoluminescence spectroscopy were employed to characterize the obtained coreshell structures. The thickness of the amorphous SiO2 shell ranges from 10 to 30 nm, and increases with the concentration of the TEOS used. The photoluminescence intensity of the coreshell structures is enhanced for the CdS nanorod samples with only a thin layer (< 10 nm) of SiO2 shell on the CdS nanorod, and is reduced for the sample with a thicker SiO2 shell. Possible reasons contributing to the variations of the photoluminescence were discussed.

Key words: Core shell structure, CdS nanorods, Semiconductor, Composite structure, Photoluminescence