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An Analytic Model of the Dynamic Response of Mass-Sensitive Chemical Sensors

Title data

Fischerauer, Gerhard ; Dickert, Franz L.:
An Analytic Model of the Dynamic Response of Mass-Sensitive Chemical Sensors.
In: Sensors and Actuators B: Chemical. Vol. 123 (May 2007) Issue 2 . - pp. 993-1001.
ISSN 0925-4005
DOI: https://doi.org/10.1016/j.snb.2006.11.002

Project information

Project financing: Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst

Abstract in another language

Mass-sensitive chemical sensors such as quartz crystal microbalances (QMB) or surface acoustic wave (SAW) devices tend to have a slow dynamic response. This is due to the fact that the chemical species to be bound in the selective sensor film diffuses into the film with characteristic diffusion coefficients on the order of only 10^{-17} m²/s. We derive a closed-form analytic solution to the problem, which involves Jacobian theta functions and is valid for all mass-sensitive sensors the dynamic response of which is dominated by diffusion effects. The model is validated by comparing its predictions to experimental data and to numerical computations. In the end, we deduce a model-based strategy capable of predicting the steady-state response and, thus, of reducing the effective response time of the sensor.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Mass-sensitive chemical sensors; SAW; QMB; dynamic response; analytic model; diffusion
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Profile Fields
Profile Fields > Emerging Fields
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 19 Feb 2016 06:52
Last Modified: 19 Feb 2016 06:52
URI: https://eref.uni-bayreuth.de/id/eprint/30867