物理化学学报 >> 2002, Vol. 18 >> Issue (05): 477-480.doi: 10.3866/PKU.WHXB20020520

研究简报 上一篇    

CdS/SiO2纳米棒核/壳结构的制备和发光性能

匡汉茂;邓兆祥;李春辉;孙晓明;庄京;李亚栋   

  1. 清华大学化学系,北京 100084;江西井岗山师范学院化学系,吉安 343009
  • 收稿日期:2001-09-12 修回日期:2002-01-09 发布日期:2002-05-15
  • 通讯作者: 李亚栋 E-mail:ydli@tsinghua.edu.cn

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

摘要: 利用在醇介质中氨水催化水解硅酸乙酯(TEOS)制备SiO2来包覆半导体CdS纳米棒而形成CdS/SiO2核/壳结构.通过X射线衍射(XRD)、透射电子显微镜(TEM)证实SiO2包覆壳层为非晶,且壳层厚度随TEOS浓度的增大而增加,在10~30 nm之间.并研究了其紫外可见吸收光谱(UVVis)和荧光发射光谱(PL)的性质.

关键词: 核壳结构, CdS纳米棒, 半导体, 复合结构, 发光光谱

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