Fig. 1From: Positive and Negative Photoconductivity Conversion Induced by H2O Molecule Adsorption in WO3 NanowireTypical I-T curves (Vds = 3 V) of an Au/h-WO3 NW/Au device recorded repeatedly with laser (445 nm, 500 mW) on and off under 40%RH (a), 50% RH (b), 60% RH (c), and 70% RH (d). The lower inset of a: SEM image of an Au/h-WO3 NW/Au device, the nanowire between two electrodes with a diameter of about 300 nm, and a length of about 4 μmBack to article page