This material is based upon work supported by the National Science Foundation under Grant # DMR-0452579. Supporting Information is available online from Wiley InterScience or from the author.
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Communication
Internally Referenced Ammonia Sensor Based on an Electrochemically Prepared Porous SiO2 Photonic Crystal†
Article first published online: 31 OCT 2007
DOI: 10.1002/adma.200602860
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
King, B., Gramada, A., Link, J. and Sailor, M. (2007), Internally Referenced Ammonia Sensor Based on an Electrochemically Prepared Porous SiO2 Photonic Crystal. Advanced Materials, 19: 4044–4048. doi: 10.1002/adma.200602860
- †
Publication History
- Issue published online: 15 NOV 2007
- Article first published online: 31 OCT 2007
- Manuscript Revised: 25 MAY 2007
- Manuscript Received: 13 DEC 2006
Funded by
- National Science Foundation. Grant Number: DMR-0452579
Keywords:
- Photonic crystals;
- Porous silicon;
- Sensors
Graphical Abstract
An oxidized porous silicon photonic crystal possessing two reflectance peaks is infused with bromothymol blue, yielding a pH-responsive ammonia vapor sensor. One reflectance peak overlaps the absorbance band of the deprotonated dye while the other appears in a “clear” spectral region. Simultaneous monitoring of both reflectance peaks corrects for large changes in probe light intensity.