Electrodeposition of tungsten oxide for high sensitive acetone detection at room temperature

Tungsten oxide thin films were electrochemically deposited onto gallium nitride for the first time and directly used for the fabrication of acetone sensor. This sensor could operate at room temperature and had high sensitivity, fast response, and long-term stability. Moreover, the detection limit of the sensor could reach 0.1 ppm, implying its potential application in non-invasive detection of diabetes.