Anodic alumina photonic crystals: Structure engineering, optical properties and prospective applications

Flat and roll-type translucent anodic porous alumina molds anodized in oxalic acid for UV nanoimprint lithography

“…We have been investigating UV nanoimprinting using anodic porous alumina (APA), which is a self-organized nanohole array material prepared by anodizing Al in an electrolyte, as a mold. [20][21][22][23][24][25][26][27] APA is a promising material as a nanoimprinting mold for forming ordered nanopillar arrays with high aspect ratios because it is possible to obtain ordered nanohole array structures with high aspect ratios by anodizing Al under appropriate anodization conditions. 28 In our previous papers, we have also reported that the resulting nanopillar arrays are useful for fabricating various functional devices such as photonic crystals, antireection structures, and superhydrophobic surfaces.…”

In Situ Synthesis of CuO/Cu2O Nanoparticle-Coating Nanoporous Alumina Membranes with Photocatalytic Activity under Visible Light Radiation

“…Importantly, the highly porous surface of nanoporous alumina membranes (NAMs) can be chemically activated, modified, or functionalized with diverse types of molecules (e.g., organosilanes, amino acids, and organic ligands) [1][2][3][4]. Advantageously, this strategy could allow us to tune the physicochemical and wettability properties of the NAM surface, which is highly desirable for diverse technological uses, such as templates for biosensors, filters, magnetic recording media, photonic crystals, plasmonic devices, catalysis, and biocatalysis [5][6][7][8][9][10].…”