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Sensors 2015, 15(10), 26115-26127; doi:10.3390/s151026115

Study of Interdigitated Electrode Arrays Using Experiments and Finite Element Models for the Evaluation of Sterilization Processes

Institute of Nano- and Biotechnologies (INB), FH Aachen University of Applied Sciences, Heinrich-Mussmann-Str. 1, Jülich 52428, Germany
Peter-Grünberg Institute (PGI-8), Forschungszentrum Jülich GmbH, Jülich 52428, Germany
Soft Matter and Biophysics, Catholic University Leuven, Celestijnenlaan 200 D, Leuven 3001, Belgium
Institute of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6-10, Marburg 35037, Germany
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Michael Tiemann
Received: 31 August 2015 / Revised: 2 October 2015 / Accepted: 9 October 2015 / Published: 14 October 2015
(This article belongs to the Special Issue Gas Sensors—Designs and Applications)
View Full-Text   |   Download PDF [3662 KB, uploaded 14 October 2015]   |  


In this work, a sensor to evaluate sterilization processes with hydrogen peroxide vapor has been characterized. Experimental, analytical and numerical methods were applied to evaluate and study the sensor behavior. The sensor set-up is based on planar interdigitated electrodes. The interdigitated electrode structure consists of 614 electrode fingers spanning over a total sensing area of 20 mm2. Sensor measurements were conducted with and without microbiological spores as well as after an industrial sterilization protocol. The measurements were verified using an analytical expression based on a first-order elliptical integral. A model based on the finite element method with periodic boundary conditions in two dimensions was developed and utilized to validate the experimental findings. View Full-Text
Keywords: sterilization process; hydrogen peroxide; interdigitated electrodes (IDE); FEM model sterilization process; hydrogen peroxide; interdigitated electrodes (IDE); FEM model

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Oberländer, J.; Jildeh, Z.B.; Kirchner, P.; Wendeler, L.; Bromm, A.; Iken, H.; Wagner, P.; Keusgen, M.; Schöning, M.J. Study of Interdigitated Electrode Arrays Using Experiments and Finite Element Models for the Evaluation of Sterilization Processes. Sensors 2015, 15, 26115-26127.

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