阳极氧化
材料科学
纳米孔
纳米孔
电解质
氧化物
铝
阳极
阳极氧化铝
电流(流体)
扩散
阳极氧化
调制(音乐)
振幅
化学工程
化学物理
复合材料
纳米技术
电极
冶金
热力学
物理化学
光学
化学
医学
美学
替代医学
物理
病理
哲学
制作
工程类
作者
Woo Lee,Jae‐Cheon Kim,U. Gösele
标识
DOI:10.1002/adfm.200901213
摘要
Abstract Nanoporous anodic aluminum oxide is prepared by hard anodization of aluminum under potentiostatic conditions using 0.3 M H 2 C 2 O 4 . 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.
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