The effects of ordering on the morphology of two-layer alumite-Forming a patterned interface

被引：5
作者：
Rauf, Abdur [1 ]
Mehmood, Mazhar [1 ]
Yuan, Zhi-hao [2 ]
Yue-Qin, Duan [2 ]
Waheed, Abdul [1 ]
机构：
[1] Pakistan Inst Engn & Appl Sci, Natl Ctr Nanotechnol, Dept Chem & Mat Engn, Islamabad 45650, Pakistan
[2] Tianjin Univ Technol, Nanomat & Nanotechnol Res Ctr, Tianjin 300191, Peoples R China
来源：
MATERIALS LETTERS | 2009年 / 63卷 / 18-19期
关键词：
Nanomaterials; Two-layer porous anodic alumina; Silver nanowires; Porosity; Interface; POROUS ANODIC ALUMINA; FABRICATION; NANOWIRES; NANOTUBES; ALLOYS;
D O I：
10.1016/j.matlet.2009.04.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two-layer alumite has been synthesized by three-step anodizing such that the 1st layer was formed by commonly known two-step anodizing at a prescribed voltage and the 2nd layer was formed at two-times higher anodizing voltage. in suitable electrolytes. When the 2nd layer is formed at an ordering voltage, alternate pores of the 1st layer continue growing through the 2nd layer, in a regular pattern. The neighboring pores cease their growth, possibly due to upward flow and thickening of barrier oxide at the new cell boundaries. The growing pores in the 2nd layer are equi-distant provided that the 1st layer is also formed under ordering conditions. If the 2nd layer is formed under non-ordering conditions the regular pattern at the interface is completely lost. Employing the two-layer alumite, nanowires by the 1st layer can be grown such that alternate pores remain empty, providing a new superlattice. (C) 2009 Elsevier B.V. All rights reserved.
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收藏
页码：1601 / 1604
页数：4
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