Sensing mechanism of polymer for selectivity enhancement of gas sensors

Kenneth K.L. Wong, Zhenan Tang, Johnny K.O. Sin, Philip Ching Ho Chan, Peter W. Cheung, Hiroyuki Hiraoka

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

6 Citations (Scopus)


The sensing mechanism of polymer gas separation membrane to enhance the selectivity of tin dioxide gas sensors is presented. Two types of Commercial polymers, XU218 and PMDA-ODA of Ciba-Geigy company, are used to coat onto the sensing film of FIGARO series tin dioxide gas sensors TGS800, TGS813 and TGS842. Different gases such as carbon monoxide, hydrogen, methane, and ammonia are used to investigate the response of the sensors. It is found that the sensors show a characteristic change in response to polar gas ammonia, a relatively small change in response to slightly polar gas carbon monoxide, and almost negligible change in response to non-polar gases hydrogen and methane.
Original languageEnglish
Title of host publicationIEEE International Conference on Semiconductor Electronics, Proceedings, ICSE
Number of pages4
Publication statusPublished - 1 Jan 1997
Externally publishedYes
EventProceedings of the 1996 IEEE International Conference on Semiconductor Electronics, ICSE - Penang, Malaysia
Duration: 26 Nov 199628 Nov 1996


ConferenceProceedings of the 1996 IEEE International Conference on Semiconductor Electronics, ICSE

ASJC Scopus subject areas

  • Engineering(all)

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