It is also found that the subsequent etching treatment in a H3PO4 solution can remove the barrier layer on AAO membrane and improve the regularity of holes.

• 扫描电镜观察显示，氧化铝膜的扩孔过程可以去掉阻碍层，并调节孔径大小，溶去二次氧化后黏附在氧化层表面的一些杂质，从而使氧化铝模板更为规则有序，孔径均一。