Engineering a Well-Aligned Composition-Graded CuSi Nanorod Array by an Oblique Angle Codeposition Technique

被引:30
作者
He, Yuping [1 ,2 ]
Fan, Jianguo [1 ,3 ]
Zhao, Yiping [2 ]
机构
[1] Univ Georgia, Dept Phys & Astron, Dept Geol, Athens, GA 30602 USA
[2] Univ Georgia, Nanoscale Sci & Engn Ctr, Athens, GA 30602 USA
[3] Univ Georgia, Ctr Adv Ultrastruct Res, Athens, GA 30602 USA
基金
美国国家科学基金会;
关键词
HIGH-CAPACITY; LITHIUM; FILM; NANOWIRES; ANODES; GROWTH;
D O I
10.1021/cg101036m
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A well-aligned composition-graded CuSi nanorod array structure has been fabricated by a simple oblique angle codeposition technique in a physical vapor deposition system. The Cu and Si graded composition distribution in the nanorods was confirmed by their elemental mapping and depth profiles. The crystal structure evolution with the nanorod length was revealed by both electron and X-ray diffractions. The size evolution of the CuSi nanorods followed a power law, which results from the combination effects of geometric shadowing and limited surface atomic diffusion. Such a graded composition distribution could relax the stress between the nanorods and the substrate, and is promising for applications where improved mmorod-substrate adhesion is required.
引用
收藏
页码:4954 / 4958
页数:5
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