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微波辅助合成水分散性CdTe/CdSe核壳型II型量子点。

Microwave-assisted synthesis of water-dispersed CdTe/CdSe core/shell type II quantum dots.

作者信息

Sai Li-Man, Kong Xiang Yang

机构信息

School of Material Science and Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200240, People's Republic of China.

出版信息

Nanoscale Res Lett. 2011 May 27;6(1):399. doi: 10.1186/1556-276X-6-399.

DOI:10.1186/1556-276X-6-399
PMID:21711922
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3211493/
Abstract

A facile synthesis of mercaptanacid-capped CdTe/CdSe (core/shell) type II quantum dots in aqueous solution by means of a microwave-assisted approach is reported. The results of X-ray diffraction and high-resolution transmission electron microscopy revealed that the as-prepared CdTe/CdSe quantum dots had a core/shell structure with high crystallinity. The core/shell quantum dots exhibit tunable fluorescence emissions by controlling the thickness of the CdSe shell. The photoluminescent properties were dramatically improved through UV-illuminated treatment, and the time-resolved fluorescence spectra showed that there is a gradual increase of decay lifetime with the thickness of CdSe shell.

摘要

报道了一种通过微波辅助方法在水溶液中简便合成硫醇酸封端的CdTe/CdSe（核/壳）型II量子点的方法。X射线衍射和高分辨率透射电子显微镜结果表明，所制备的CdTe/CdSe量子点具有高结晶度的核/壳结构。通过控制CdSe壳层的厚度，核/壳量子点表现出可调谐的荧光发射。通过紫外光照处理，光致发光性能得到显著改善，时间分辨荧光光谱表明，随着CdSe壳层厚度的增加，衰减寿命逐渐增加。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/b928facde195/1556-276X-6-399-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/8d2219b5ab4e/1556-276X-6-399-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/3028006aef3d/1556-276X-6-399-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/0f58bf54a658/1556-276X-6-399-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/b928facde195/1556-276X-6-399-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/8d2219b5ab4e/1556-276X-6-399-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/3028006aef3d/1556-276X-6-399-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/0f58bf54a658/1556-276X-6-399-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d6f/3211493/b928facde195/1556-276X-6-399-4.jpg

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本文引用的文献

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微波介导的量子点在中等温度下的非水相合成
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