Abstract
The gas sensor based on platinum-catalyzed ultrathin indium nitride (Pt-InN) was used to detect liver disease by sub-ppm ammonia (NH3) concentration variation in an ambient environment simulating exhaled human breath. Because the InN with strong surface electron accumulation extensively enhanced sensitivity, the NH3 gas sensor minimum detection limit is 0.2 ppm. Meanwhile, the sensor enables to distinguish slight deviation in NH3 concentration between 0.2 and 0.8 ppm that brings simple diagnosis of liver disease for portable and homecare clinical applications.
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