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At room temperature, high sensitivity for detecting ethanol has been achieved from α-Fe2O3/ZnO nanowire piezo-nanogenerator as self-powered gas sensor. Such ethanol sensing can be ascribed to piezo-surface coupling effect of the heterostructured nanocomposites. The results demonstrate a novel approach for room-temperature ethanol sensors and promote the development of self-powered sensing.
Room-temperature self-powered/active humidity sensing has been realized from Sb-doped ZnO nanowire (NW) arrays by coupling their piezoelectric and gas sensing characteristics. The piezoelectric output of the device acts as both the power source and the response signal against relative humidity (RH). Upon exposure to 70% RH, the piezoelectric output of Sb-doped ZnO NWs decreases from 1.35V (10% RH)...
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