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Inside back cover

Back cover

Journal of Materials Chemistry C Vol -2

Journal of Materials Chemistry C Vol -1

A room-temperature method for coating a ZnS shell on semiconductor quantum dots

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhu, Dong-Liang Jiang, Peng Zhu, Chun-Nan Zhang, Guo-Jun Pang, Dai-Wen Zhang, Zhi-Ling
Copyright Year	2015
Abstract	A green room-temperature method based on phase transfer and a reaction between Zn2+ and S2− in toluene for coating a ZnS shell on CdSe and Ag2S quantum dots (QDs), respectively, has been developed. In this method, the S2− anions in Na2S aqueous solution were transferred to toluene via electrostatic interactions between the anions and didodecyldimethylammonium bromide (DDAB), which served as an excellent sulfur precursor and thereby reacted with Zn2+ to form a ZnS shell on the surface of semiconductor QDs in the presence of QDs in an organic phase. After the ZnS shell was coated on QDs, the photoluminescence (PL) intensities of the CdSe and Ag2S QDs were found to increase approximately 12 times and 14 times, respectively, while both the emission wavelengths and the peak shapes were well maintained. The proposed method is novel, simple and robust, providing a green solution to the preparation of ZnS shell-coated QDs.
Starting Page	964
Ending Page	967
Page Count	4
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	3
Issue Number	5
Journal	Journal of Materials Chemistry C
DOI	10.1039/c4tc02437k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Toluene Silver sulfide Quantum Bromine Sulfur Semiconductor Photoluminescence
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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