Highly ordered porous anodic alumina (PAA) films are fabricated with high efficiency by stable high-field anodization in oxalic acid/ethanol/water electrolytes at 100–180V and sulfuric acid/oxalic acid/ethanol/water electrolytes at 30–80V, giving interpore distances in the range of 225–450nm and 70–140nm, respectively. The photoluminescence of PAA films prepared by high-field anodization shows remarkable redshift of the peak position and decrease of the intensity compared to that of PAA films formed by conventional low-field anodization.
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Li et al. (2007) studied this question.
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