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Conformal anodic oxidation of aluminum thin films

Abstract : Membrane-based synthesis, also called template synthesis, is a very general approach used to prepare arrays of nanomaterials with monodispersed geometrical features. The most commonly used porous templates are track-etched polycarbonate and porous anodic alumina membranes. Common to all these templates is the fact that the pores are perpendicular to the surface of the membrane. Here, a novel approach is presented, where the pores are synthesized parallel to the surface of the membrane. For the first time, the anodic oxidation of an aluminum thin film is performed laterally, i.e., parallel to the surface of the substrate, instead of perpendicular as usually done. For low anodic oxidation voltages (between 3 and 5 V) we obtain highly regular and ordered pore arrays, at least over a few hundred nanometers length, with a minimum pore size of similar to 3 to 4 nm. With such porous alumina structures, the controlled in-plane organization of arrays of template-grown nanowires and carbon nanotubes for reproducible device fabrication should be much easier.
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https://hal-polytechnique.archives-ouvertes.fr/hal-01068521
Contributor : Gaëlle Bruant <>
Submitted on : Thursday, September 25, 2014 - 5:04:46 PM
Last modification on : Friday, July 31, 2020 - 9:24:06 AM

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C. S. Cojocaru, J.M. Padovani, T. Wade, C. Mandoli, G. Jaskierowicz, et al.. Conformal anodic oxidation of aluminum thin films. Nano Letters, American Chemical Society, 2005, 5 (4), pp.675-680. ⟨10.1021/nl050079b⟩. ⟨hal-01068521⟩

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