Preparation and Properties of Transparent Conducting Copper Nanowires Film

The copper nanowires with high aspect ratio were prepared by chemical reduced Cu(NO3)2 solution with hydrazine hydrate. It was characterized through X-ray diffraction, scanning electron microscopy, transmission electron microscopy. The effect of reaction conditions on the product, such as the ratio of raw materials, the feeding mode of hydrazine hydrate, was investigated. The copper nanowires was filtered out by the syringe filter membrane with 0.45 μm pore diameter, and was transfered to a commercial optical film of mobile telephone to prepare the copper nanowires film. The luminousness and surface resistance of copper nanowires were measured by the ultraviolet spectrograph and the 4-points probe sheet resistance instrument. Results show that the obtained copper nanowires were single crystal with the length greater than 40 μm and the diameter less than 100 nm. The obtained conducting copper nanowire film shows 50% visiable light transmittance and the average surface resistance was 26 Ω.