Study of the contact properties of ZnO nanowires with Ag and Au/Ag

摘要

Zinc oxide (ZnO) nanowires have been synthesized using thermal evaporation approach on quartz (SiO2) substrates in nitrogen atmosphere with a mixture of milled ZnO and graphite powder as reactants. Ohmic behavior has been obtained for both Ag and Au/Ag contact to ZnO nanowires. The samples were re-examined after annealing at 300°C, 400°C and 500°C. The optimum annealing temperature for obtaining minimum resistance of Ag and Au/Ag contact with ZnO nanowires are 400°C and 300°C respectively. The contact is dominated by Metal-Zinc bonds rather than Metal-Oxygen bonds which cause the formation of ohmic behavior.