Nanometer pore arrays alumina films were prepared by anodizing of highly pure aluminum foils in sulfuric and oxalic acid solution . the porous alumina layers were detached from the al substrate by using step - down voltage or solution method 在草酸和硫酸溶液中，通过阳极氧化高纯铝片的方法制备了纳米氧化铝膜孔阵列，用阶梯降压法或溶解法将氧化铝膜层和铝基底分离。
