Size Effects in the CO Sensing Properties of Nanostructured TiO2 Thin Films Fabricated by Colloidal Templating

Title
Size Effects in the CO Sensing Properties of Nanostructured TiO2 Thin Films Fabricated by Colloidal Templating
Authors
문희규장호원김진상박형호윤석진
Keywords
TiO2 thin film gas sensors; colloidal templating; nanostructured; size effects; large-scale uniformity
Issue Date
2010-03
Publisher
Electronic materials letters
Citation
VOL 6, NO 1, 31-34
Abstract
This study investigates the CO sensing properties of nanostructured TiO2 thin film gas sensors fabricated with colloidal templates using different sizes of polymer spheres. Compared to plain films, the nanostructured films show enhanced gas sensing in the form of greater sensitivity and a faster response. More interestingly, the use of colloidal templates with smaller spheres (300 nm in diameter) leads to close-packed nanostructured TiO2 thin films with very large-scale uniformity and a more pronounced improvement in CO sensing compared to the use of larger spheres (1 μm in diameter). This result suggests that an understanding of the sphere size effects on the gas sensing properties of nanostructured TiO2 thin films created by colloidal templating is important in the development of these films for actual applications.
URI
http://pubs.kist.re.kr/handle/201004/37281
ISSN
1738-8090
Appears in Collections:
KIST Publication > Article
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