期刊
NANO LETTERS
卷 12, 期 12, 页码 6385-6392出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl3036993
关键词
Size effect; nanocrystalline; mechanical properties; molecular dynamics
类别
资金
- NSF [DMR-0748267]
- Office of Naval Research [N00014-09-1-0883]
- National Defense Science and Engineering Graduate (NDSEG) [32 CFR 168a]
- Kavli Nanoscience Institute at Caltech
We report the synthesis, mechanical properties, and deformation mechanisms of polycrystalline, platinum nanocylinders of grain size d = 12 nm. The number of grains across the diameter, Did, was varied from S to 80 and 1.5 to 5 in the experiments and molecular dynamics simulations, respectively. An abrupt weakening is observed at a small D/d, while the strengths of large nanopillars are similar to bulk. This smaller is weaker trend is opposite to the smaller is stronger size effect in single crystalline nanostructures. The simulations demonstrate that the size-dependent behavior is associated with the distinct deformation mechanisms operative in interior versus surface grains.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据