Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 204, Issue 5, Pages 1417-1422Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.200674369
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Nanopore covered microporous porous silicon (PS) interfaces have been formed to provide an active scaffolding for the creation of sensor and microreactor configurations. Rapidly responding (<= 2s), reversible, and sensitive (<= 2 ppm), PS gas sensors, operating at room temperature, and based on a uniquely formed highly efficient electrical contract to the nanopore covered microporous array, are modified by introducing active nanoparticles to establish gas selectivity. In a complementary manner, active sites can be introduced for the purpose of forming a nanostructure based microreactor. Pulsing techniques and FFT analysis allow the gas response of the sensors to be measured, without saturation, and filtered on a drifting baseline to eliminate false positives and the effects of external noise. TiO2-xNx visible light absorbing photocatalysts are introduced to quartz surfaces and to the PS structure for the purpose of creating a microreactor and subsequently to form the preconditioner for a solar pumped sensor. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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