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Photothermal hydrogen sensor: the technique, experimental process, and physicochemical analysis

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Abstract

The kinetics of hydrogen adsorption and desorption on palladium thin films was studied via photomodulated thermoreflectance measurements. The subsequent analysis based on a Langmuirian isothermal model supports dissociative adsorption of hydrogen on palladium followed by molecular desorption. Furthermore, the rate constants of adsorption and desorption were determined and their values are discussed. The response and recovery times of the sensor were measured and their dependence on hydrogen concentration is also explored and discussed.

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Authors and Affiliations

  1. Department of Physics, University of Cyprus, P.O. Box 20537, 1678, Nicosia, Cyprus

    Chrysanthi Demetriou & Constantinos Christofides

  2. Department of Engineering, University of Nicosia, P.O. Box 24005, 1700, Nicosia, Cyprus

    Marios Nestoros

Authors
  1. Chrysanthi Demetriou
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  2. Marios Nestoros
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  3. Constantinos Christofides
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Correspondence to Constantinos Christofides.

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Demetriou, C., Nestoros, M. & Christofides, C. Photothermal hydrogen sensor: the technique, experimental process, and physicochemical analysis. Appl. Phys. A 92, 651–658 (2008). https://doi.org/10.1007/s00339-008-4596-x

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  • DOI: https://doi.org/10.1007/s00339-008-4596-x

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