Self-ordering behavior of anodic porous alumina via selenic acid anodizing

Tatsuya Kikuchi, Osamu Nishinaga, Shungo Natsui, Ryosuke O. Suzuki

研究成果: Article査読

59 被引用数 (Scopus)

抄録

The self-ordering behavior of anodic porous alumina that was formed by anodizing in selenic acid electrolyte (H2SeO4) at various concentrations and voltages was investigated with SEM and AFM imaging. A high purity aluminum foil was anodized in 0.1-3.0 M selenic acid solutions at 273 K and at constant cell voltages in the range of 37 to 51 V. The regularity of the cell arrangement increased with increasing anodizing voltage and selenic acid concentration under conditions of steady oxide growth without burning. Anodizing at 42-46 V in 3.0 M selenic acid produced highly ordered porous alumina. By selective dissolution of the anodic porous alumina, highly ordered convex nanostructures of aluminum with diameters of 20 nm and heights of 40 nm were exposed at the apexes of each hexagonal dimple array. Highly ordered anodic porous alumina with a cell size of 102 nm from top to bottom can be fabricated by a two-step selenic acid anodizing process, that includes the first anodizing step, the selective oxide dissolution, and the second anodizing step.

本文言語English
ページ(範囲)728-735
ページ数8
ジャーナルElectrochimica Acta
137
DOI
出版ステータスPublished - 2014 8 10
外部発表はい

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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