... significant recent interest in the use of surface-functionalized thin film and nanowire wide bandgap semiconduc-tors, principally GaN, InN, ZnO and SiC, for sensing of gases, heavymetals, UV photons and ... 1–5919 Recent advances in wide bandgap semiconductor biological and gas sensors S.J. Peartona,*, F. Renb, Yu-Lin Wangb, B.H. Chub, K.H. Chenb, C.Y. Changb,Wantae Lima, Jenshan Linc, ... hand-held wirelesstransmitter to realize a portable, fast and high sensitive CO2sensor.2.4. CH4sensingOf particular interest in developing wide bandgap sensors are methods for detecting...