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Flexible Calorimetric Gas Sensors for Detection of a Broad Concentration Range of Gaseous Hydrogen Peroxide: A Step Forward to Online Monitoring of Food-Package Sterilization Processes

  • In this study, flexible calorimetric gas sensors are developed for specificdetection of gaseous hydrogen peroxide (H2O2) over a wide concentrationrange, which is used in sterilization processes for aseptic packaging industry.The flexibility of these sensors is an advantage for identifying the chemicalcomponents of the sterilant on the corners of the food boxes, so-called “coldspots”, as critical locations in aseptic packaging, which are of greatimportance. These sensors are fabricated on flexible polyimide films bymeans of thin-film technique. Thin layers of titanium and platinum have beendeposited on polyimide to define the conductive structures of the sensors. Todetect the high-temperature evaporated H2O2, a differential temperature set-up is proposed. The sensors are evaluated in a laboratory-scaled sterilizationsystem to simulate the sterilization process. The concentration range of theevaporated H2O2from 0 to 7.7% v/v was defined and the sensors havesuccessfully detected high as well as low H2O2concentrations with asensitivity of 5.04C/% v/v. The characterizations of the sensors confirmtheir precise fabrication, high sensitivity and the novelty of low H2O2concentration detections for future inline monitoring of food-packagesterilization.

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Author:Farnoosh Vahidpour, Jan Oberländer, Michael J. Schöning
Parent Title (English):Phys. Status Solidi A
Publisher:WILEY-VCH Verlag GmbH & Co
Place of publication:Weinheim
Document Type:Article
Year of Completion:2018
Date of the Publication (Server):2018/06/21
Length:7 Seiten
First Page:Article number 1800044
Institutes:FH Aachen / Fachbereich Medizintechnik und Technomathematik
FH Aachen / INB - Institut für Nano- und Biotechnologien