Preparation and characterization of porous nano copper films

Nanocrystalline porous copper films were prepared by sol-gel method with polyethylene glycol (PEG) as organic template, copper acetate as raw material and (di) ethanolamine (DEA) as chelating agent. Copper nanowire array films were fabricated by electrodeposition within anodic aluminum oxide (AAO) membrane. The films were analyzed by infrared absorption (IR), thermogravimetry-derivative thermogravimetry (TG-DTG), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscope (SEM) and atomic force microscope (AFM). The structure of the copper films which achieved by sol-gel was remarkable influenced by sol concentration, polyethylene glycol content and annealing temperature. The effects of annealing temperature and the way of gelation on grain sizes were discussed. The results showed that films could be made under the optimum condition: sol concentration was 0.6 mol/L, annealing temperature was 500 °C, and polyethylene glycol content was 0.35 g. The structure of the nanoarray films which obtained by electrodeposition was influenced by current density and electrodeposition time. When the electrodeposition time was 5 min, and current density was 1.0 A/dm ², the nanoarray structure was the best.