Mechanical Properties of Si Nanowires as Revealed by in Situ Transmission Electron Microscopy and Molecular Dynamics Simulations
文献类型：期刊论文
| 作者 | D. M. Tang ; C. L. Ren ; M. S. Wang ; X. L. Wei ; N. Kawamoto ; C. Liu ; Y. Bando ; M. Mitome ; N. Fukata ; D. Golberg |
| 刊名 | Nano Letters
 |
| 出版日期 | 2012 |
| 卷号 | 12期号:4页码:1898-1904 |
| 关键词 | Silicon nanowires nanomechanics in situ electron microscopy tensile bending size effects to-ductile transition boron-nitride nanotubes large-strain plasticity silicon nanowires carbon nanotubes semiconductor nanowires ws2 nanotubes tensile tests strength brittle |
| ISSN号 | 1530-6984 |
| 中文摘要 | Deformation and fracture mechanisms of ultrathin Si nanowires (NWs), with diameters of down to similar to 9 nm, under uniaxial tension and bending were investigated by using in situ transmission electron microscopy and molecular dynamics simulations. It was revealed that the mechanical behavior of Si NWs had been closely related to the wire diameter, loading conditions, and stress states. Under tension, Si NWs deformed elastically until abrupt brittle fracture. The tensile strength showed a clear size dependence, and the greatest strength was up to 11.3 GPa. In contrast, under bending, the Si NWs demonstrated considerable plasticity. Under a bending strain of <14%, they could repeatedly be bent without cracking along with a crystalline-to-amorphous phase transition. Under a larger strain of >20%, the cracks nucleated on the tensed side and propagated from the wire surface, whereas on the compressed side a plastic deformation took place because of dislocation activities and an amorphous transition. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60257]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | D. M. Tang,C. L. Ren,M. S. Wang,et al. Mechanical Properties of Si Nanowires as Revealed by in Situ Transmission Electron Microscopy and Molecular Dynamics Simulations[J]. Nano Letters,2012,12(4):1898-1904. |
| APA | D. M. Tang.,C. L. Ren.,M. S. Wang.,X. L. Wei.,N. Kawamoto.,...&D. Golberg.(2012).Mechanical Properties of Si Nanowires as Revealed by in Situ Transmission Electron Microscopy and Molecular Dynamics Simulations.Nano Letters,12(4),1898-1904. |
| MLA | D. M. Tang,et al."Mechanical Properties of Si Nanowires as Revealed by in Situ Transmission Electron Microscopy and Molecular Dynamics Simulations".Nano Letters 12.4(2012):1898-1904. |
入库方式： OAI收割
来源：金属研究所
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