Bifunctional Sensing Mechanism of SnO2-ZnO Composite Nanofibers for Drastically Enhancing the Sensing Behavior in H-2 Gas
- Title
- Bifunctional Sensing Mechanism of SnO2-ZnO Composite Nanofibers for Drastically Enhancing the Sensing Behavior in H-2 Gas
- Author
- 김현우
- Keywords
- composite nanofibers; SnO2; ZnO; sensors; hydrogen
- Issue Date
- 2015-05
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v. 7, Page. 11351-11358
- Abstract
- SnO2-ZnO composite nanofibers fabricated using an electrospinning method exhibited exceptional hydrogen (H-2) sensing behavior. The existence of tetragonal SnO2 and hexagonal ZnO nanograins was confirmed by an analysis of the crystalline phase of the composite nanofibers. A bifunctional sensing mechanism of the composite nanofibers was proposed in which the combined effects of SnO2-SnO2 homointerfaces and ZnO-SnO2 heterointerfaces contributed to an improvement in the H-2 sensing characteristics. The sensing process with respect to SnO2-ZnO heterojunctions is associated not only with the high barrier at the junctions, but also the semiconductor-to-metallic transition on the surface of the ZnO nanograins upon the introduction of H-2 gas.
- URI
- http://pubs.acs.org/doi/abs/10.1021/acsami.5b01817http://hdl.handle.net/20.500.11754/24790
- ISSN
- 1944-8244
- DOI
- 10.1021/acsami.5b01817
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML