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Novel composite organic-inorganic semiconductor sensors for the quantitative detection of target organic vapours

Ewen, Richard J.; De Lacy Costello, Benjamin P.J.; Honeybourne, Colin L.; de Lacy Costello, Ben; Ewen, R.J; Honeybourne, C.L; Evans, Phillip; Ratcliffe, Norman M.

Authors

Richard J. Ewen

Benjamin P.J. De Lacy Costello

Colin L. Honeybourne

R.J Ewen

C.L Honeybourne

Phillip Evans



Abstract

Composites of tin dioxide (an n-type semiconductor) and derivatives of the conducting polymer polypyrrole (a p-type semiconductor) gave reversible changes in electrical resistance at room temperature when exposed to a range of organic vapours. The optimum amount of polymer giving highest sensitivity was found by experiment to be 2.5% by mass for the polypyrrole chloride-tin dioxide composite. Composites containing 2.5% polymer by mass, but differing in polymer derivative, were fabricated and exposed to low concentrations of ethanol, methanol, acetone, methyl acetate and ethyl acetate. All were found to give significant and reversible decreases in electrical resistance. Direct comparison with sensors constructed solely of tin dioxide or polypyrrole at room temperature showed the composites to be more sensitive. The gas sensitivity of the composite materials depended on the type of polymer derivative incorporated and the dopant anion associated with the polymer. The composites were simple to fabricate and gave differing response profiles to a range of organic vapours.

Journal Article Type Article
Publication Date Jan 1, 1996
Journal Journal of Materials Chemistry
Print ISSN 0959-9428
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 6
Issue 3
Pages 289-294
APA6 Citation Honeybourne, C. L., Ewen, R. J., De Lacy Costello, B. P., de Lacy Costello, B., Evans, P., Ewen, R., …Ratcliffe, N. M. (1996). Novel composite organic-inorganic semiconductor sensors for the quantitative detection of target organic vapours. Journal of Materials Chemistry, 6(3), 289-294. https://doi.org/10.1039/JM9960600289
DOI https://doi.org/10.1039/JM9960600289
Publisher URL http://dx.doi.org/10.1039/JM9960600289

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