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  • Title: Penetrating the oxide barrier in situ and separating freestanding porous anodic alumina films in one step.
    Author: Tian M, Xu S, Wang J, Kumar N, Wertz E, Li Q, Campbell PM, Chan MH, Mallouk TE.
    Journal: Nano Lett; 2005 Apr; 5(4):697-703. PubMed ID: 15826111.
    Abstract:
    A simple method for penetrating the barrier layer of an anodic aluminum oxide (AAO) film and for detaching the AAO film from residual Al foil was developed by reversing the bias voltage in situ after the anodization process is completed. With this technique, we have been able to obtain large pieces of free-standing AAO membranes with regular pore sizes of sub-10 nm. By combining Ar ion milling and wetting enhancement processes, Au nanowires were grown in the sub-10 nm pores of the AAO films. Further scaling down of the pore size and extension to the deposition of nanowires and nanotubes of materials other than Au should be possible by further optimizing this procedure.
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