Deposition behavior on the barrier layer of porous anodic alumina

This work is trying to fabricate nanostructure, for the first time, on the porous anodic alumina’s (PAA) barrier layer, which has smooth half-sphere structure. The deposition of indium oxide confirms that the materials can completely cover the surface area of the barrier layer. Both chemical dissolving the PAA or mechanical peel-off can bring free-standing indium oxide thin layer. Morphology study on both sides of deposited layer verifies that the ordered indium oxide nanorods can self-arrange well and form a half-sphere front surface and nanohole-array rear surface. This work confirms that we can get some special nanostructures with the help of the barrier layer of PAAs.