Spontaneous Current Oscillations during Hard Anodization of Aluminum under Potentiostatic Conditions

被引：132

作者：

Lee, Woo ^{[1
]}

Kim, Jae-Cheon ^{[1
]}

Goesele, Ulrich ^{[2
]}

机构：

[1] Korea Res Inst Stand & Sci, Taejon 305340, South Korea

[2] Max Planck Inst Microstruct Phys, D-06210 Halle, Germany

来源：

ADVANCED FUNCTIONAL MATERIALS | 2010年 / 20卷 / 01期

关键词：

POROUS ANODIC ALUMINA; HEXAGONAL PORE ARRAYS; VOLTAGE OSCILLATIONS; PULSE ANODIZATION; VOLUME EXPANSION; OXIDE FORMATION; SILICON; GROWTH; FILMS; OXIDATION;

D O I：

10.1002/adfm.200901213

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanoporous anodic aluminum oxide is prepared by hard anodization of aluminum under potentiostatic conditions using 0.3 m H2C2O4. Under unstirred electrolyte condition, spontaneous current oscillations are observed. The amplitude and period of these current oscillations are observed to increase with anodization time. As a consequence of the oscillatory behavior, the resulting anodic alumina exhibits modulated pore structures, in which the diameter contrast and the length of pore modulation increase with the amplitude and the period of current oscillations, respectively, and the current peak profile determines the internal geometry of oxide nanopores. The mechanism responsible for the oscillatory behavior is suggested to be a diffusion-controlled anodic oxidation of aluminum.

引用

页码：21 / 27

页数：7

共 47 条

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