Study of the Sensing Mechanism Towards Carbon Monoxide of Platinum-Based Field Effect Sensors

Becker, ElinCompetence Centre for Catalysis and the Department Chemical and Biological Engineering, Chalmers, University of Technology, Gothenburg (författare)

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.

Andersson, MikeLinköpings universitet,Tillämpad Fysik,Tekniska högskolan(Swepub:liu)mikan22 (författare)
Eriksson, MatsLinköpings universitet,Tillämpad Fysik,Tekniska högskolan(Swepub:liu)mater45 (författare)
Lloyd Spetz, AnitaLinköpings universitet,Tillämpad Fysik,Tekniska högskolan(Swepub:liu)anill63 (författare)
Skoglundh, MagnusCompetence Centre for Catalysis and the Department Chemical and Biological Engineering, Chalmers, University of Technology, Gothenburg (författare)
Competence Centre for Catalysis and the Department Chemical and Biological Engineering, Chalmers, University of Technology, GothenburgTillämpad Fysik (creator_code:org_t)

Av författaren/redakt...: Becker, Elin; Andersson, Mike; Eriksson, Mats; Lloyd Spetz, Ani ...; Skoglundh, Magnu ...

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