TY - JOUR
T1 - Fabrication of plate-like Ta3N5crystals through evaporation-deposition-re-evaporation of alkali halide fluxes onto tantalum substrates
AU - Wagata, Hajime
AU - Yanai, Minori
AU - Kim, Daewook
AU - Suzuki, Sayaka
AU - Hojamberdiev, Mirabbos
AU - Yubuta, Kunio
AU - Terashima, Chiaki
AU - Teshima, Katsuya
N1 - Funding Information:
This work was partially supported by the “A Shinshu-Method for Regional Innovation Ecosystem by Industrial Implementation of Innovative Inorganic Crystal Material Technology” project of the “Program on Regional Innovation and Ecosystem Formation” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
Publisher Copyright:
© The Royal Society of Chemistry 2020.
PY - 2020/9/21
Y1 - 2020/9/21
N2 - 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.
AB - 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.
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U2 - 10.1039/d0ce00806k
DO - 10.1039/d0ce00806k
M3 - Article
AN - SCOPUS:85091086779
VL - 22
SP - 5723
EP - 5730
JO - CrystEngComm
JF - CrystEngComm
SN - 1466-8033
IS - 35
ER -
