Fabrication of plate-like Ta3N5crystals through evaporation-deposition-re-evaporation of alkali halide fluxes onto tantalum substrates

Hajime Wagata, Minori Yanai, Daewook Kim, Sayaka Suzuki, Mirabbos Hojamberdiev, Kunio Yubuta, Chiaki Terashima, Katsuya Teshima

研究成果: Contribution to journalArticle査読

抄録

Ta3N5nanostructured films have been explored as photoanodes for photoelectrochemical water splitting. Despite a number of efforts, it is still difficult to control the facet of single-crystalline Ta3N5, which directly affects the properties, due to its harsh growth conditions. In addition, the fabrication methods of Ta3N5films involve complex multi-step procedures and/or require complicated equipment. In this study, we report on facile fabrication of plate-like Ta3N5crystals with predominant {010} crystallographic planes covering the Ta substrate surface by flux growth under an ammonia gas flow. Among alkali halide fluxes (KF, KCl, and KI), KF emerged as an effective flux for the growth of Ta3N5crystals. Combining KF and KI promoted further crystal growth, producing larger Ta3N5crystals. The crystals were confirmed as single-crystalline by TEM. The crystal growth process and shape evolution in the flux were investigated and discussed.

本文言語英語
ページ(範囲)5723-5730
ページ数8
ジャーナルCrystEngComm
22
35
DOI
出版ステータス出版済み - 9 21 2020
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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