Publication: Electronic nose for toxic gas detection based on photostimulated core-shell nanowires
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Issued Date
2014-01-01
Resource Type
ISSN
20462069
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2-s2.0-84906536022
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Mahidol University
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SCOPUS
Bibliographic Citation
RSC Advances. Vol.4, No.66 (2014), 35084-35088
Suggested Citation
Chatchawal Wongchoosuk, Kittitat Subannajui, Chunyu Wang, Yang Yang, Firat Güder, Teerakiat Kerdcharoen, Volker Cimalla, Margit Zacharias Electronic nose for toxic gas detection based on photostimulated core-shell nanowires. RSC Advances. Vol.4, No.66 (2014), 35084-35088. doi:10.1039/c4ra06143h Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/33605
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Title
Electronic nose for toxic gas detection based on photostimulated core-shell nanowires
Abstract
A novel fabrication of microelectronic nose based on ZnO nanowires and ZnO surface modifications including ZnO-ZnAl2O4 core-shell nanowires and ZnO-Zn2TiO4 core-shell nanowires gas-sensing elements operated at room temperature is reported. By combining vapor-phase transport processes and atomic layer deposition techniques, highly homogeneous core-shell nanowires structures can be successfully obtained on large scale areas. Under ultraviolet illumination of the specific oxide surfaces, photo-stimulated oxygen species (O2-(ads)) respond to and dominate the gas sensing mechanism of the core-shell nanowires at room temperature. Principal component analysis results show the perfect discrimination of gases including toxic gases and non-toxic gases. This novel device can be used to identify both gas types with concentrations in the ppb level at room temperature. © 2014 the Partner Organisations.