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Stability Investigation of CuInS2 based heavy-metal free nanocrystals

Published online by Cambridge University Press:  09 March 2011

Chuang Xie ,
Yu Zhang ,
Andrew Y. Wang ,
William W. Yu ,
Jingkang Wang  and
Jian Xu
Chuang Xie
Affiliation:
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China Department of Engineering Science and Mechanics, Penn State, State College, PA 16802, USA
Yu Zhang
Affiliation:
Department of Engineering Science and Mechanics, Penn State, State College, PA 16802, USA
Andrew Y. Wang
Affiliation:
Ocean Nano Tech LLC., Springdale, Arkansas 72764, USA
William W. Yu
Affiliation:
Worcester Polytechnic Worcester, MA, USA
Jingkang Wang
Affiliation:
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Jian Xu
Affiliation:
Department of Engineering Science and Mechanics, Penn State, State College, PA 16802, USA
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Abstract

In the present work the photostability of high-quality CuInS2 based nanocrystals (Zn-Cu-In-S/ZnSe/ZnS and CuInS2/ZnS core/shell nanocrystals) of different sizes and concentrations were investigated at ambient condition both under UV irradiation and in the darkness. The photostability of commercial CdSe/ZnS core/shell nanocrystals were used as reference to compare to that of CuInS2 based nanocrystals. The half-life times of the CuInS2 base nanocrystals are 2-8 times that of the reference which indicates the CuInS2 base NCs we obtained in the present work are very stable, reliable and competent for the application in biomedical fields.

Keywords

semiconductingnanostructureoptical properties

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