Photomodulated thermoreflectance detection of hydrogen at elevated temperatures: a detection limit

Othonos, Andreas; Christofides, Constantinos
February 2003
Applied Physics Letters;2/10/2003, Vol. 82 Issue 6, p904
Academic Journal
Laser photomodulated thermoreflectance has been used as a means of detecting, at elevated temperatures, low concentration of hydrogen using an optically thin film of palladium. Data indicate that concentrations as low as a few parts per billion can easily be detected at 100 °C. A semi-quantitative interpretation of the photothermal signal has been achieved using a Langmurian isothermic model.


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