Novel vapor sensor based on chemical coupling effect of composite

Xiangdong Chen; Daben Yang; Yadong Jiang; Zhiming Wu; Shaohong Wang; Dan Li

doi:10.1117/12.267122

14 February 1997 Novel vapor sensor based on chemical coupling effect of composite

Xiangdong Chen, Daben Yang, Yadong Jiang, Zhiming Wu, Shaohong Wang, Dan Li

Proceedings Volume 3040, Smart Structures and Materials 1997: Smart Materials Technologies; (1997) https://doi.org/10.1117/12.267122
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

A novel sensing material has been developed for constructing a sensor of solvent vapours using chemical coupling effect of composite, which is different from conventional electron-moving chemiresistors for use as gas sensors. The composites consisting of polymer loaded with conductive filler near the percolation threshold exhibit sensitive characters comparable to that of conventional semiconductor gas sensor but can be realized with much simpler technology and operated at room temperature. This sensor can also obtain better selectivity by choosing different polymer matrix. Theoretic analysis and experimental results show sensitive properties of composite sensor greatly depend on composition of composite and grain size of conducting particles. In general resistance variation R/Rin the presence of vapor is more for higher volume fraction offiller and larger grain size of conducting particles.

Citation Download Citation

Xiangdong Chen, Daben Yang, Yadong Jiang, Zhiming Wu, Shaohong Wang, and Dan Li "Novel vapor sensor based on chemical coupling effect of composite", Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997); https://doi.org/10.1117/12.267122

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