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Title: A carbon monoxide gas sensor using oxygen plasma modified carbon nanotubes
Authors: Yan, Qingyu
Zhao, Weiyun
Fam, Derrick Wen Hui
Yin, Zongyou
Sun, Ting
Tan, Huiteng
Liu, Weiling
Boey, Freddy Yin Chiang
Zhang, Hua
Hng, Huey Hoon
Tok, Alfred Iing Yoong
Issue Date: 2012
Source: Zhao, W., Fam, D. W. H., Yin, Z., Sun, T., Tan, H. T., Liu, W., et al. (2012). A carbon monoxide gas sensor using oxygen plasma modified carbon nanotubes. Nanotechnology, 23(42).
Series/Report no.: Nanotechnology
Abstract: Carbon monoxide (CO) is a highly toxic gas that can be commonly found in many places. However, it is not easily detected by human olfaction due to its colorless and odorless nature. Therefore, highly sensitive sensors need to be developed for this purpose. Carbon nanotubes (CNTs) have an immense potential in gas sensing. However, CNT-based gas sensors for sensing CO are seldom reported due to the lack of reactivity between CO and CNTs. In this work, O2 plasma modified CNT was used to fabricate a CNT gas sensor. The plasma treated CNTs showed selectively towards CO, with the capability of sensing low concentrations of CO (5 ppm) at room temperature, while the pristine CNTs showed no response. UV spectra and oxygen reduction reaction provided evidence that the difference in sensing property was due to the elimination of metallic CNTs and enhancement of the oxygen reduction property.
ISSN: 0957-4484
DOI: 10.1088/0957-4484/23/42/425502
Schools: School of Materials Science & Engineering 
Rights: © 2012 IOP Publishing Ltd.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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