文献类型：期刊文献

英文题名：Aqueous phase synthesis of biostabilizer capped CdS nanocrystals with bright emission

作者：Zou, Lei[1];Fang, Zheng[1];Gu, Zhenyu[1];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Adv Mat Lab, Shanghai 200237, Peoples R China

年份：2009

卷号：129

期号：5

起止页码：536

外文期刊名：JOURNAL OF LUMINESCENCE

收录：;EI(收录号：20090811913091);WOS:【SCI-EXPANDED(收录号:WOS:000264454400024)】；

基金：We thank the National Natural Science Foundation of China (Nos. 20501005 and 20771037), the Program for New Century Excellent Talents in University of China (NCET-06-0417), Pujiang Talents Project (07pj14032), Shuguang Project (06SG33) and SRFDP (20070251014) for financial supports.

语种：英文

外文关键词：CdS nanocrystals; Aqueous synthesis; Glutathione; Photoluminescence

摘要：In this manuscript, we present a facile approach for the synthesis of highly luminescent CdS nanocrystals (maximum quantum yield of 36%) by the reaction of Cd2+ and thiourea in the presence of glutathione (GSH) as capping reagent. The influence of various experimental variables, including pH value, S-to-Cd ratio, as well as Cd-to-ligand ratio, on the growth rate and optical properties of the obtained US nanocrystals has been systematically investigated. Experimental results indicate that the pH value and Cd-to-ligand molar ratio play a crucial role in determining luminescent properties of the obtained CdS nanocrystals. Furthermore, the luminescence intensity can be enhanced significantly when the nanocrystals sample is illuminated by room light. The mechanism for the resulting high-quality optical properties of the obtained US nanocrystals is also elucidated. (C) 2008 Elsevier B.V. All rights reserved.