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Reflective interferometric gas sensing using nanoporous anodic aluminium oxide (AAO)
Author(s) -
Kumeria Tushar,
Losic Dusan
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201105425
Subject(s) - nanoporous , aluminium , materials science , adsorption , aluminium oxide , interferometry , anode , metal , oxide , hydrogen , interference (communication) , porosity , anodic aluminum oxide , platinum , chemical engineering , nanotechnology , optics , chemistry , metallurgy , composite material , electrode , catalysis , organic chemistry , computer science , physics , computer network , channel (broadcasting) , engineering , alternative medicine , pathology , fabrication , medicine
This Letter reports the use of nanoporous anodic aluminium oxide (AAO) for reflective interferometric gas sensing. Gas detection is based on changes of the interference signal from AAO porous layer as a result of the specific adsorption of gas molecules on a metal coated surface. Two different metal coatings – gold (Au) and platinum (Pt) – were used and their application for the detection of hydrogen sulphide (H 2 S) and hydrogen (H 2 ) is shown. The practical application of a microchip Au‐AAO sensor for measurement of H 2 S concentration and monitoring of malodour is also presented. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)