Self-Assembly of Periodic Serrated Nanostructures

被引：37
|
作者：
Li, Dongdong [1 ,2 ]
Jiang, Chuanhai [2 ]
Jiang, Jianhua [2 ]
Lu, Jia G. [1 ]
机构：
[1] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
来源：
CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 02期
关键词：
FUEL-CELL APPLICATIONS; HEXAGONAL PORE ARRAYS; ANODIC ALUMINUM-OXIDE; ELECTROCATALYTIC ACTIVITY; OXYGEN BUBBLES; POROUS ALUMINA; NANOWIRES; NANORODS; METHANOL; GROWTH;
D O I：
10.1021/cm8022242
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 similar to 25 degrees 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.
引用
收藏
页码：253 / 258
页数：6
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