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Grain-Size-Tuned Highly H-2-Selective Chemiresistive Sensors Based on ZnO-SnO2 Composite Nanofibers

Title
Grain-Size-Tuned Highly H-2-Selective Chemiresistive Sensors Based on ZnO-SnO2 Composite Nanofibers
Author
김현우
Keywords
oxide; nanofibers; SnO2; ZnO; hydrogen; sensors
Issue Date
2016-01
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v. 8, NO 4, Page. 2486-2494
Abstract
We investigated the effect of grain size on the H-2-sensing behavior of SnO2-ZnO composite nanofibers. The 0.9SnO(2)-0.1ZnO composite nanofibers were calcined at 700 degrees C for various times to control the size of nanograins. A bifunctional sensing mechanism, which is related not only to the SnO2-SnO2 nanograins, but also to the ZnO-SnO2 nanograins with surface metallization effect, is responsible for the grain-oriented H-2-sensing properties and the selective improvement in sensing behavior to H-2 gas compared to other gases. Smaller grains are much more favorable for superior H-2 sensing in SnO2-ZnO composite nanofibers, which will be an important guideline for their use in H-2 sensors. The one-dimensional nanofiber-based structures in the present study will be efficient in maximizing the sensing capabilities by providing a larger amount of junctions.
URI
http://pubs.acs.org/doi/10.1021/acsami.5b08416http://hdl.handle.net/20.500.11754/30560
ISSN
1944-8244
DOI
10.1021/acsami.5b08416
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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