Metal�?�semiconductor nanojunctions and their rectification characteristics

[摘要] Junctions of silverâ€�?�copper oxide and silverâ€�?�zinc oxide, respectively were prepared within the pores of diameters, 20 nm, in anodic aluminium oxide membranes. Voltageâ€�?�current characteristics were measured over the temperature range 373â€�??573 K which showed rectification behaviour. Using the standard equation the difference between the work functions of the metal and the semiconductor was calculated. This showed a variation with the temperature of measurement. This is explained as arising due to the effect of pressure generated as a result of thermal expansion of the metallic phases concerned between the electrodes. This is consistent with the theoretical prediction of Fermi level shifting of the semiconductor within the bandgap as a function of pressure.

[学科分类] 材料工程

[关键词] Metalâ€�?�semiconductor nanojunctions;rectification characteristics;nanostructure systems;singlewalled carbon nanotubes.