✦ LIBER ✦

A low-power sensor for volatile organic compounds based on porous silicon photonic crystals

✍ Scribed by Dorvee, Jason ;Sailor, Michael J.

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 360 KB
Volume: 202
Category: Article
ISSN: 0031-8965
DOI: 10.1002/pssa.200461201

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✦ Synopsis

Abstract

A miniaturized, low‐power chemical sensor for volatile organic compounds using a porous Si photonic crystal is demonstrated. The device uses simple electronic circuitry a light‐emitting diode, a phototransistor, and thin film of a 1‐dimensional photonic crystal of porous Si, drawing 0.5 W of power. Integration of the freestanding porous silicon film with the conventional circuitry is discussed as well as the current detection limits for ethanol vapor in air. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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## Abstract One‐dimensional photonic crystals constructed from multilayered stacks of porous Si are used as sensors for gas‐phase volatile organic compounds (VOCs). The ability of a double‐stack structure to provide compensation for drift due to changing relative humidity (RH) is investigated. In t