Room temperature gas sensing with potassium titanate nanowires

We have studied the influence of organic vapors, acetone and ethanol, on the resistance of potassium titanate nanowire nonwoven net (PTN) at room temperature. We find that the PTN resistance is reproducibly reduced under appearance of the vapor molecules that might be explained by the influence of the adsorbed species on the electronic/ionic transport. The selectivity of the sensor could be greatly enhanced in order to recognize the kind of the vapors by processing a response of the PTN segment array formed at the same substrate by multiple co-planar electrodes.