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Synthesis and Control of ZnS Nanodots and Nanorods with Different Crystalline Structure from an Identical Raw Material Solution and the Excitonic UV Emission

Published online by Cambridge University Press:  01 March 2011

Masato Uehara ,
Satoshi Sasaki ,
Yusuke Nakamura ,
Changi Lee ,
Hiroyuki Nakamura  and
Hideaki Maeda
Masato Uehara
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 807-1, Shuku-machi, Tosu, Saga 841-0052, Japan
Satoshi Sasaki
Affiliation:
Kyusyu University, 6-1, Kasuga-kouen, Kasuga, Fukuoka 816-8580, Japan
Yusuke Nakamura
Affiliation:
Kyusyu University, 6-1, Kasuga-kouen, Kasuga, Fukuoka 816-8580, Japan
Changi Lee
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 807-1, Shuku-machi, Tosu, Saga 841-0052, Japan
Hiroyuki Nakamura
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 807-1, Shuku-machi, Tosu, Saga 841-0052, Japan
Hideaki Maeda
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 807-1, Shuku-machi, Tosu, Saga 841-0052, Japan Kyusyu University, 6-1, Kasuga-kouen, Kasuga, Fukuoka 816-8580, Japan CREST, Japan Science and Technology Agency, 4-1-8, Hon-cho, Kawaguchi 332-0012, Japan.
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Abstract

We synthesized ZnS nanocrystals from identical raw material solution by the thermal decomposition of an amine complex. The shapes of products were changed by simply varying heating rate. At higher heating rate, we obtained the isotropic zincblende nanocrystals. At the lower heating rate, the nanorods were formed and the length was increased with the decrease of heating rate. The nanorods had wurtzite structure below 175 °C, and consequently transformed to zincblende phase during a temperature rise to 200 °C. These particle shapes and phases were related to the adsorption properties of amine ligands. Additionally, the synthesized ZnS nanodots and nanorods exhibited predominantly band-edge emission in fluorescence spectra.

Keywords

particulateluminescenceII-VI
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1299: Symposium S – Microelectromechanical Systems—Materials and Devices IV , 2011 , mrsf10-1299-s04-03
Copyright
Copyright © Materials Research Society 2011

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References

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