Size Effects in the CO Sensing Properties of Nanostructured TiO2 Thin Films Fabricated by Colloidal Templating
- Size Effects in the CO Sensing Properties of Nanostructured TiO2 Thin Films Fabricated by Colloidal Templating
- 문희규; 장호원; 김진상; 박형호; 윤석진
- TiO2 thin film gas sensors; colloidal templating; nanostructured; size effects; large-scale uniformity
- Issue Date
- Electronic materials letters
- VOL 6, NO 1, 31-34
- 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.
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