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Fabrication and Characterization of Semiconducting ZnO nanofiber for Advanced Environmental Sensing
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- Authors
- Tae Hyoung Zyung, Su-Jae Lee, Jin-Ah Park, Jae Hyun Moon
- Issue Date
- 2009-10
- Citation
- Electrochemical and Solid-State Letters, v.16, no.12, pp.87-93
- ISSN
- 1099-0062
- Publisher
- Electrochemical Society (ECS)
- Language
- English
- Type
- Journal Article
- Abstract
- Nanostructured semiconducting metal oxides offer an extremely high surface/volume ratio which have detecting sensitivity of part per million and even below, dynamic range and decrease the response time by more than 10-fold in comparison with thin film materials. Motivated by the recent development in fabricating and synthesizing nano-sized metal oxides, we have used an electrospinning method to produce semiconducting ZnO nanofibers for advanced environmental sensing. ZnO/PVP composite fiber mats were directly electrospun onto a SiO2/Si at 120°C, then calcined at 600°C. Polycrystalline wurtzite ZnO nanofibers of diameter in 35-70 nm were obtained. The CO gas sensing performances have been evaluated in a CO concentration range of 10??25 ppm. The resistances of ZnO nanofibers were observed to decrease upon exposure to CO. This is attributed to the reducing nature of CO. which reacts with O to release an extra electron. © The Electrochemical Society.
- KSP Keywords
- CO concentration, CO gas sensing, Composite fibers, Concentration range, Detecting sensitivity, Environmental sensing, Fiber mats, Metal-oxide(MOX), Semiconducting metal oxide(SMO), Thin film materials, Volume ratio