キムラ　ヤスオ   木村　康男    所属   工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2020
形態種別	学術論文
査読	査読あり
標題	Response characteristics of a highly sensitive gas sensor using a titaniumoxide nanotubefilm decorated with platinum nanoparticles
執筆形態	共著
掲載誌名	Sensors and Actuators B
掲載区分	国外
出版社・発行元	Elservier
巻・号・頁	321,pp.128525
総ページ数	10
著者・共著者	Hiroyuki Abe, Yasuo Kimura, Teng Ma, Daisuke Tadaki, Ayumi Hirano-Iwata and Michio Niwano
概要	Titanium oxide nanotube thin films formed by anodic oxidation of titanium metal exhibit high reactivity towards various gases at high temperatures. To date, various types of gas sensors using titanium oxide nanotube films have been proposed. Previously, we proposed a microscale gas sensor with titanium oxide nanotube thin films fabricated by local anodization of titanium microelectrodes. In this study, to improve the response characteristics of titanium oxide nanotube-based microscale gas sensors, we decorated titanium oxide nanotube films with catalytic noble metals of platinum nanoparticles using atomic layer deposition technique. We confirmed that due to Pt decoration the sensitivity was significantly improved for hydrogen and carbon monoxide gases. The detection limit of hydrogen gas was found to be in the sub-ppm range. The response characteristics of hydrogen and carbon monoxide gases were analyzed in detail based on the Langmuir adsorption model. It was found that when the concentration of gas increased, the adsorption mode changed from adsorption on the top surface of the film to that on the inner wall of the titanium oxide nanotubes. We also show that the trace amounts of carbon monoxide gas in a mixed gas containing oxygen and nitrogen can be detected.
researchmap用URL	https://doi.org/10.1016/j.snb.2020.128525
論文（査読付）ファイル	DOWNLOAD