Self-Assembly of Periodic Serrated Nanostructures

Anodic aluminum oxide membranes with serrated nanochannels have been successfully fabricated via a two-step annodization method. The serrated channels with periodic intervals are aligned at an angle of ∼25° along the stem channels. The formation of the serrated channels is attributed to the generati...

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Bibliographic Details
Published in:Chemistry of materials 2009-01, Vol.21 (2), p.253-258
Main Authors: Li, Dongdong, Jiang, Chuanhai, Jiang, Jianhua, Lu, Jia G
Format: Article
Language:English
Subjects:
Electrochemistry
Porous Materials (including Meso- and Micro-Porous Materials)
Templated and Nanoimprinted Materials
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Summary:Anodic aluminum oxide membranes with serrated nanochannels have been successfully fabricated via a two-step annodization method. The serrated channels with periodic intervals are aligned at an angle of ∼25° along the stem channels. The formation of the serrated channels is attributed to the generation of oxygen gas bubbles and the resulted compressive stress on the oxide membrane. To reveal the inside channel structure, platinum is electrodeposited into the template. The as-synthesized serrated Pt nanowires demonstrate a superior electrocatalytic activity due to significantly enhanced electric field strength around serrated tips. Moreover, hierarchical serrated/straight hybrid structures are constructed using this simple and innovative self-assembly technique.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm8022242