A1 Refereed original research article in a scientific journal

Detecting amine vapours with thermally carbonized porous silicon gas sensor




AuthorsBjorkqvist M, Salonen J, Tuura J, Jalkanen T, Lehto VP

Publication year2009

Journal:physica status solidi (c)

Journal name in sourcePHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 7

Journal acronymPHYS STATUS SOLIDI C

Volume6

Issue7

First page 1769

Last page1772

Number of pages4

ISBN*****************

ISSN1610-1634

DOIhttps://doi.org/10.1002/pssc.200881025


Abstract
A capacitive type porous silicon based gas sensor for detecting amine vapours has been developed. The sensor is highly sensitive, e.g., to methylamine and trimethylamine vapours, and its electrical parameters recover totally after exposure to studied gases. Thermal carbonization of porous silicon under acetylene atmosphere was carried out to produce stable and attractive surface to amine vapours. The sensor response to studied amine vapours can be separated from its response to humidity changes since their electrical responses act reversely. In addition to the vapours of methylamine/water and trimethylamine/water solutions, the sensor was also used to detect different amines, which are generated during spoilage of raw shrimps and Baltic herring fillets at room temperature. Fourier Transform Infrared spectroscopy was used to detect the amine vapours and other volatile compounds simultaneously with sensor measurements. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim



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