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Vertically Ordered Hematite Nanotube Array as an Ultrasensitive and Rapid Response Acetone Sensor

Authors
Kim, Do HongShim, Young-SeokJeon, Jong-MyeongJeon, Hu YoungPark, Sung SooKim, Young-WoonRim, Jin-SangLee, Jong-HeunJang, Ho Won
Issue Date
10-9월-2014
Publisher
AMER CHEMICAL SOC
Keywords
hematite; nanotube array; acetone sensor; earth abundant; ultrasensitive
Citation
ACS APPLIED MATERIALS & INTERFACES, v.6, no.17, pp.14779 - 14784
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
6
Number
17
Start Page
14779
End Page
14784
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/97407
DOI
10.1021/am504156w
ISSN
1944-8244
Abstract
Vertically ordered nanotube array is a desirable configuration to improve gas sensing properties of the hematite which is the most abundant and cheapest metal oxide semiconductor on earth but has low and sluggish chemiresistive responses. We have synthesized a vertically aligned, highly ordered hematite nanotube array directly on a patterned SiO2/Si substrate and then it used as a gas sensor without additional processing. The nanotube array sensor shows unprecedentedly ultrahigh and selective responses to acetone with detection limits down to a few parts per billion and response time shorter than 3 s.
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