Grain-Size-Tuned Highly H-2-Selective Chemiresistive Sensors Based on ZnO-SnO2 Composite Nanofibers
- Authors
- Katoch, Akash; Ul Abideen, Zain; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Feb-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- oxide; nanofibers; SnO2; ZnO; hydrogen; sensors
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.4, pp.2486 - 2494
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 4
- Start Page
- 2486
- End Page
- 2494
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/24023
- DOI
- 10.1021/acsami.5b08416
- ISSN
- 1944-8244
- 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
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