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Synthesis of Sulfide Nanoparticles by the Pulsed Electric Discharge

Published online by Cambridge University Press:  12 April 2012

Emil Omurzak ,
Tsutomu Mashimo  and
Saadat Sulaimankulova
Emil Omurzak*
Affiliation:
Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan. Tel./Fax: 81 96 342 3934.
Tsutomu Mashimo
Affiliation:
Shock Wave and Condensed Matter Research Centre, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
Saadat Sulaimankulova
Affiliation:
Institute of Chemistry and Chemical Technology, National Academy of Sciences, Chui pr. 267, Bishkek 720071, Kyrgyzstan.
*
*Corresponding author’s e-mail address: emil@kumamoto-u.ac.jp
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Abstract

Synthesis of wurtzite-type ZnS nanoparticles by an electric discharge submerged in molten sulfur is reported. By the pulsed plasma between two zinc electrodes of 5 mm diameter in molten sulfur, we have synthesized high-temperature phase (wurtzite-type) ZnS nanocrystals with an average size of about 20 nm. Refined lattice parameters of the synthesized wurtzite-type ZnS nanoparticles were found to be larger than those of the reported ZnS (JCPDS 36-1450). UV-Visible absorption spectroscopy analysis showed that the absorption peak of the as-prepared ZnS sample (319 nm) displays a blue-shift comparing to the bulk ZnS (335 nm). Photoluminescence spectra of the samples revealed peaks at 340, 397, 423, 455 and 471 nm, which were related to excitonic emission and stoichiometric defects. Synthesis of ZnMgS (solid solution of ZnS and MgS) was achieved by using ZnMg alloys as both cathode and anode electrodes. Also, rocksalt structure MgS was synthesized by using magnesium rods as both cathode and anode electrodes.

Keywords

electrochemical synthesisluminescencenanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1409: Symposium CC – Functional Semiconductor Nanocrystals and Metal-Hybrid Structures , 2012 , mrsf11-1409-cc05-01
Copyright
Copyright © Materials Research Society 2012

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References

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