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Optimisation and fabrication of a calorimetric gas sensor built up on a polyimide substrate for H 2 O 2 monitoring
Author(s) -
Kirchner Patrick,
Oberländer Jan,
Friedrich Peter,
Berger Jörg,
Suso HenriPierre,
Kupyna Andriy,
Keusgen Michael,
Schöning Michael J.
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201001132
Subject(s) - polyimide , catalysis , foil method , substrate (aquarium) , exothermic reaction , materials science , fabrication , radical , analytical chemistry (journal) , chemical engineering , chemistry , layer (electronics) , nanotechnology , organic chemistry , composite material , medicine , oceanography , alternative medicine , pathology , geology , engineering
A calorimetric gas sensor for the detection of vapourised H 2 O 2 in aseptic filling processes was built up on a polyimide foil instead of silicon as substrate material in order to optimise the sensor response behaviour. The sensor was catalytically activated with a dispersion of manganese(IV) oxide. The reaction mechanism of the exothermic H 2 O 2 decomposition on the catalyst involves two pathways: an initial reaction with electron exchange between the catalyst surface and H 2 O 2 creating free radicals, and a chain reaction of these radicals with H 2 O 2 , in which the final products, namely water and oxygen, are formed. The calorimetric gas sensor possesses a linear response behaviour with a sensitivity of 7.15 °C/(% v/v) in a H 2 O 2 concentration range from 0 to 8% v/v.Calorimetric gas sensor on polyimide foil for H 2 O 2 monitoring in sterilisation processes.