A single ZnO nanowire with intrinsic oxygen vacancies was utilized to fabricate four-contact device with focus ion beam lithography technique. Cathodoluminescent spectra indicate strong near- ultraviolet and green emission at both room temperature and low temperatures. Experimental measurement revealed the temperature-dependent conductivity of the ZnO nanowire at below 100K. The further theoretical analysis confirmed that weak localization played an important role in the electrical transport, which was attributed to the surface states induced by plenty of oxygen vacancies in ZnO nanowire.

Cathodoluminescent and Electrical Properties of an Individual ZnO Nanowire with Oxygen Vacancies. He, X.B., Yang, T.Z., Cai, J.M., Zhang, C.D., Guo, H.M., Shi, D.X., Shen, C.M., Gao, H.J.: Chinese Physics B, 2008, 17[9], 3444-7