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A new type of hydrogen sensor based on a floating gate field effect transistor (FG-FET) with a n-octadecyltrichlorsilane (ODTS) modified platinum layer of 20 nm in thickness as a gas sensitive layer is presented. The modifications stabilize the sensor signal even at temperatures up to 125degC. The surface of polycrystalline platinum is well known to act as sensitive layer for hydrogen detection in...
For safety reasons, while handling fuel cells, hydrogen concentrations of 0.1 -3% and above need to be detected. Low power hydrogen sensors, based on a Field Effect Transistor (FET), have been in use for about 25 years. In the past platinum and palladium were often used as gas sensitive layers. Unfortunately in the required concentration range, the Pt based sensors have a poor selectivity at room...
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