ZnO spintronics and nanowire devices

The fabrication of many types of ZnO nanowire devices, including mosfets, diodes and UV sensors was discussed. ZnO is a piezoelectric, transparent wide bandgap semiconductor used in surface acoustic wave devices. ZnO has been effectively used as gas sensor material based on the near-surface modification of charge distribution with certain surface-absorbed species. The single ZnO nanorods with Ohmic contacts at either end exhibit large changes in current upon exposing the surface region to polar liquids introduced through an integrated microchannel. The sensitive pH sensors were made using single ZnO nanowires. The mechanism of the current reduction on relation to the adsorption of the polar liquid molecules on the ZnO surface was presented.