Self-ordering regimes of porous alumina: The 10% porosity rule
Self-ordering regimes of porous alumina: The 10% porosity rule
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DOI：
10.1021/n1025537k
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发表时间：
2002-07-01
期刊：
影响因子：
10.8
通讯作者：
Gosele, U
中科院分区：
文献类型：
--
作者：
Nielsch, K;Choi, J;Gosele, U
通过电化学阳极氧化获得的自有序多孔氧化铝的透射电子显微镜分析表明，自有序需要10%的孔隙率，独立于特定的阳极氧化条件。这相当于氧化铝与铝的体积膨胀率约为1.2。我们建议，自有序的多孔氧化铝与任何孔间距离是可能的，如果施加的电位，这主要决定了孔间距离，和电解质的pH值，这主要定义了孔半径，符合10%的孔隙率规则。
Transmission electron microscopy analysis of self-ordered porous alumina obtained by electrochemical anodization shows that self-ordering requires a porosity of 10%, independent of the specific anodization conditions. This corresponds to a volume expansion of alumina to aluminum of about 1.2. We propose that self-ordering of porous alumina with any interpore distance is possible if the applied potential, which mainly determines the interpore distance, and the pH value of the electrolyte, which mainly defines the pore radius, match the 10% porosity rule.