P1.8.9 Flexible Ammonia Sensor Based on Polyaniline/Carbon Black Composites Operating at Elevated Temperatures

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A highly sensitive ammonia sensor has been fabricated by depositing solution processable polyaniline/carbon black conductive composites on to flexible polyimide substrates with gold interdigitated electrodes. This was tested toward very low concentrations of ammonia vapor at a sensor temperature of 80 °C. Due to the high affinity of polyaniline to ammonia and presence of conductive pathways in carbon black through the composite, the sensor exhibits sensitive and fast response down to ppb concentrations. The high...