温度对CdS纳米颗粒形状和光致发光特性的影响  

Effect of temperature on the shape of CdS nanocrystals and photoluminescence properties

作　　者：薛洪涛[1] 赵普琴[2] 

机构地区：[1]南京邮电大学应用物理系,南京210003 [2]南京工业大学应用物理系

出　　处：《原子与分子物理学报》2007年第2期379-383,共5页Journal of Atomic and Molecular Physics

基　　金：国家重点基础研究发展计划(G2001CB3095)

摘　　要：采用反胶束法,在常温和低温下(接近零度)合成了硅土包裹的CdS纳米颗粒.高分辨电镜表明常温下合成的颗粒呈现直径小于5 nm的球形,而在低温下出现了短棒形和长达微米量级的线形.通过对实验过程的分析表明:不仅合成CdS纳米颗粒溶液的浓度,而且温度对CdS纳米颗粒的形状产生了重要的影响.进一步研究了CdS纳米颗粒的光致发光特性.Silica-overcoated CdS nanocrystals were synthesized by a reverse-micelle method at different temperatures. HRTEM images show that CdS nanocrystals prepared at room temperation are sphere-shaped and below 5 nm in diameter,but the CdS nanocrystals prepared at zero become rod-shaped and wire-shaped with a length of several micra . Analysis of experiment process shows that not only the monomer concentration but the growth temperature plays a key role for determination of the shape of CdS nanocrystals. Furthermore, we study the properties of photoluminescence （PL） of CdS nanocrystals.

关 键 词：CdS纳米颗粒 形状 温度 光致发光 

分 类 号：O472.3[理学—半导体物理]