Synthesis of Tungsten Diselenide Nanoparticles by Chemical Vapor Condensation Method

Authors

  • Oleg V. Tolochko Saint Petersburg State Polytechnical University
  • Vasilyeva S. Ekaterina Saint Petersburg State Polytechnic University
  • Albert G. Nasibulin
  • Maxim Maximov
  • Anil Sachdev
  • Xincheng XIAO

DOI:

https://doi.org/10.5755/j01.ms.21.3.7356

Keywords:

WSe2, nanoparticles, chemical vapor condensation, chemical synthesis, layered structures

Abstract

Crystalline tungsten diselenide (WSe2) nanoparticles have been synthesized by a gas phase reaction using tungsten hexacarbonyl and elemental selenium as precursors. The WSe2 nanoparticle morphology varies from the spherical shape to flake-like layered structures. Mean size in smaller dimension are less than 5 nm and the number of layers decreased linearly with decreasing of reaction time and concentration of carbonyl in the gas phase. The mean value of interlayer distance in <0001> direction is comparable with the microscopic values. The selenium-to-tungsten atomic ratios of 2.07, 2.19 and 2.19 were determined respectively, approach to the stoichiometric ratio of 2:1. Main impurities are oxygen and carbon and strongly interrelated with carbonyl concentration in the gas phase.

DOI: http://dx.doi.org/10.5755/j01.ms.21.3.7356

Author Biographies

Oleg V. Tolochko, Saint Petersburg State Polytechnical University

Material Science Dept.

Vasilyeva S. Ekaterina, Saint Petersburg State Polytechnic University

Materials Science Deparment

Downloads

Published

2015-07-27

Issue

Vol. 21 No. 3 (2015)

Section

ELECTRONIC AND OPTICAL MATERIALS

License

 

The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.