Experimental Verification II: Substrate Grain Orientation-Dependent Self-ordering
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As stated in Chap. 1, recent experiments by Ng and Ngan [1, 2, 3], Beck et al. [4, 5], and Napolskii et al. [6, 7] have indicated a strong influence of the substrate grain orientation on the self-ordering in anodic porous alumina. Anodic porous alumina with straight pore channels grown in a stable, self-ordered manner is formed on (001) oriented Al grains, while disordered porous pattern is formed on (101) oriented Al grains with branched pore channels growing in an unstable manner .