Controlled optical properties of water-soluble CdTe nanocrystals via anion exchange

	Controlled optical properties of water-soluble CdTe nanocrystals via anion exchange
	Li, Jing 1; Jia, Jianguang 1; Lin, Yuan 2; Zhou, Xiaowen 2
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2016-02-01
卷号	463 页码:69-74
关键词	CdTe nanocrystal Optical property Anion exchange Temperature
英文摘要	We report a study on anion exchange reaction of CdTe nanocrystals with S2- in aqueous solution under ambient condition. We found that the optical properties of CdTe nanocrystals can be well tuned by controlling the reaction conditions, in which the reaction temperature is crucially important. At low reaction temperature, the product nanocrystals showed blue-shifts in both absorption and PL spectra, while the photoluminescence quantum yield (PLQY) was significantly enhanced. When anion exchanges were carried out at higher reaction temperature, on the other hand, obvious red shifts in absorption and PL spectra accompanied by a fast increase followed by gradual decrease in PLOY were observed. On variation of S2- concentration, it was found that the overall kinetics of Te2- for S2- exchanges depends also on [S2-] when anion exchanges were performed at higher temperature. A possible mechanism for anion exchanges in CdTe NCs was proposed. (C) 2015 Elsevier Inc. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/29530]
专题	化学研究所_光化学实验室
作者单位	1.Beijing Univ Chem Technol, Sch Sci, Dept Phys Chem, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Jing,Jia, Jianguang,Lin, Yuan,et al. Controlled optical properties of water-soluble CdTe nanocrystals via anion exchange[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2016,463:69-74.
APA	Li, Jing,Jia, Jianguang,Lin, Yuan,&Zhou, Xiaowen.(2016).Controlled optical properties of water-soluble CdTe nanocrystals via anion exchange.JOURNAL OF COLLOID AND INTERFACE SCIENCE,463,69-74.
MLA	Li, Jing,et al."Controlled optical properties of water-soluble CdTe nanocrystals via anion exchange".JOURNAL OF COLLOID AND INTERFACE SCIENCE 463(2016):69-74.