Self-organized formation of hexagonal pore arrays in anodic alumina
Self-organized formation of hexagonal pore arrays in anodic alumina
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DOI：
10.1063/1.121004
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发表时间：
1998-03-09
影响因子：
4
通讯作者：
Gosele, U
中科院分区：
文献类型：
--
作者：
Jessensky, O;Muller, F;Gosele, U
以草酸和硫酸为电解液，研究了阳极氧化铝自组织形成有序六方结构的条件。在这两种酸中氧化得到高度有序的孔阵列。有序畴的大小强烈地依赖于阳极氧化电压。该效果与氧化期间铝的体积膨胀的电压依赖性和氧化物形成的电流效率相关。提出在金属/氧化物界面处产生的机械应力引起相邻孔之间的排斥力，从而促进有序的六边形孔阵列的形成。(C)1998年美国物理学会。[S0003-6951（98）03510-4]。
The conditions for the self-organized formation of ordered hexagonal structures in anodic alumina were investigated for both oxalic and sulfuric acid as an electrolyte. Highly ordered pore arrays were obtained for oxidation in both acids. The size of the ordered domains depends strongly on the anodizing voltage. This effect is correlated with a voltage dependence of the volume expansion of the aluminum during oxidation and the current efficiency for oxide formation. The resulting mechanical stress at the metal/oxide interface is proposed to cause repulsive forces between the neighboring pores which promote the formation of ordered hexagonal pore arrays. (C) 1998 American Institute of Physics. [S0003-6951(98)03510-4].