Synthesis of relatively small-diameter tungsten ditelluride nanowires from solution-grown tungsten oxide nanowires. (22nd February 2021)

• Record Type: Journal Article
• Authors: Yomogida, Yohei; Nagano, Mai; Hamasaki, Hiromu; Hirahara, Kaori; Miyata, Yasumitsu; Yanagi, Kazuhiro
• Is Part Of: Japanese journal of applied physics. Volume 60:Number SC(2021)
• Publication Date: 2021-02-22
• Subjects: transition metal dichalcogenides -- tungsten ditelluride -- tellurization -- nanotubes -- nanowires -- WTe2 nanowires -- tungsten ditelluride nanowires; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/abe201
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Tungsten ditelluride (WTe2 ) is a semi-metallic transition metal dichalcogenide (TMDC). WTe2 has attracted a lot of interest for topological properties and various applications such as batteries. In this study, we developed a method to obtain WTe2 nanowires from solution-grown tungsten oxide nanowires. By optimizing the supply of Te vapor, which strongly influences sample composition and structure, and using small-diameter solution-grown nanowires as precursors, we finally synthesized relatively small-diameter WTe2 nanowires with diameters of 15–50 nm. Interestingly, nanowire structures are mainly obtained via tellurization, but when sulfurization and selenization are applied on the same precursors, nanotube structures are obtained. We assume that the volume increase via chalogenization is a key parameter that determines the formation of nanotubes and nanowires.