Synthesis of tungsten diselenide nanoparticles by chemical vapor condensation method

Ekaterina Vasilyeva, Albert G. Nasibulin, Maxim Maximov, Oleg Tolochko, Anil Sachdev, Xingcheng Xiao

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Crystalline tungsten diselenide (WSe2) nanoparticles have been synthesized by a gas phase reaction using tungsten hexacarbonyl and elemental selenium as precursor. The WSe2 nanoparticle morphology varies from the spherical shape to flake-like layered structures. Usually particles consist of 5 – 7 single layers of WS2. Mean size in smaller dimension are less than 5 nm and the number of layers decreased linearly with decreasing 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 in the interval of 2.07 …2.19 were determined, approach to the stoichiometric ratio of 2:1. Main impurities are oxygen and carbon and strongly interrelated with carbonyl concentration in the gas phase.

    Original languageEnglish
    Pages (from-to)339-342
    Number of pages4
    JournalMedziagotyra
    Volume21
    Issue number3
    DOIs
    Publication statusPublished - 27 Jul 2015

    Keywords

    • Chemical synthesis
    • Chemical vapor condensation
    • Layered structures
    • WSe<inf>2</inf> nanoparticles

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