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. © 2012 Rahman et al.
CITATION STYLE
Rahman, M. M., Garcia-Caurel, E., Santos, A., Marsal, L. F., Pallarès, J., & Ferré-Borrull, J. (2012). Effect of the anodization voltage on the pore-widening rate of nanoporous anodic alumina. Nanoscale Research Letters, 7. https://doi.org/10.1186/1556-276X-7-474
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