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Study of the Sensing Mechanism Towards Carbon Monoxide of Platinum-Based Field Effect Sensors
Competence Centre for Catalysis and the Department Chemical and Biological Engineering, Chalmers, University of Technology, Gothenburg.
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-0873-2877
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2817-3574
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2011 (English)In: IEEE SENSORS JOURNAL, ISSN 1530-437X, Vol. 11, no 7, 1527-1534 p.Article in journal (Refereed) Published
Abstract [en]

We have investigated the temperature dependence and the effect of hydrogen on the CO response of MISiC field effect device sensors. The evolution of adsorbates on a model sensor was studied by in situ DRIFT spectroscopy and correlated to sensor response measurements at similar conditions. A strong correlation between the CO coverage of the sensor surface and the sensor response was found. The temperature dependence and hydrogen sensitivity are partly in agreement with these observations, however at low temperatures it is difficult to explain the observed increase in sensor response with increasing temperature. This may be explained by the reduction of a surface oxide or removal of oxygen from the Pt/SiO2 interface at increasing temperatures. The sensing mechanism of MISiC field effect sensors is likely complex, involving several of the factors discussed in this paper.

Place, publisher, year, edition, pages
IEEE , 2011. Vol. 11, no 7, 1527-1534 p.
Keyword [en]
CO, diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, gas sensors, hydrogen, MISiC, platinum, platinum oxide, sensing mechanism
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-68819DOI: 10.1109/JSEN.2010.2099652ISI: 000290734100001OAI: oai:DiVA.org:liu-68819DiVA: diva2:421232
Available from: 2011-06-08 Created: 2011-06-08 Last updated: 2015-03-24

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Andersson, MikeEriksson, MatsLloyd Spetz, Anita

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