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

Title
Vertically Ordered Hematite Nanotube Array as an Ultrasensitive and Rapid Response Acetone Sensor
Authors
Do Hong KimYoung-Seok ShimJong-Myeong JeonHu Young JeongSung Soo ParkYoung-Woon Kim김진상Jong-Heun LeeHo Won Jang
Keywords
hematite; acetone sensor; nanotube array; earth abundant; ultrasensitive
Issue Date
2014-08
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 6, 14779-14784
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.
URI
http://pubs.kist.re.kr/handle/201004/48497
ISSN
19448244
Appears in Collections:
KIST Publication > Article
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