Effect of the anodization voltage on the porewidening rate of nanoporous anodic alumina

Abstract : A detailed study of the pore-widening rate of nanoporous anodic alumina layers as a function of the anodization voltage was carried out. The study focuses on samples produced under the same electrolyte and concentration but different anodization voltages within the self-ordering regime. By means of ellipsometry-based optical characterization, it is shown that in the porewidening process, the porosity increases at a faster rate for lower anodization voltages. This opens the possibility of obtaining three-dimensional nanostructured nanoporous anodic alumina with controlled thickness and refractive index of each layer, and with a refractive index difference of up to 0.24 between layers, for samples produced with oxalic acid electrolytes.
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Submitted on : Friday, September 21, 2012 - 3:09:45 PM
Last modification on : Wednesday, March 27, 2019 - 4:20:03 PM
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Mohammad Mahbubur Rahman, Enric Garcia-Caurel, Abel Santos, Lluis F. Marsal, Josep Pallares, et al.. Effect of the anodization voltage on the porewidening rate of nanoporous anodic alumina. Nanoscale Research Letters, SpringerOpen, 2012, 7, pp.474. ⟨10.1186/1556-276X-7-474⟩. ⟨hal-00734352⟩

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