Structural modification of a multiply twinned nanoparticle by ion irradiation:: A molecular dynamics study

被引：14

作者：

Jarvi, T. T. ^{[1
]}

Kuronen, A. ^{[1
]}

Nordlund, K. ^{[1
]}

Albe, K. ^{[2
]}

机构：

[1] Univ Helsinki, Accelerator Lab, FI-00014 Helsinki, Finland

[2] Tech Univ Darmstadt, Inst Mat Wissensch, D-64287 Darmstadt, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 12期

基金：

芬兰科学院;

关键词：

Boundary structure - Partial melting - Structural modification - Vacancy concentration;

D O I：

10.1063/1.2825045

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the possibility of modifying the structure of a multiply twinned nanoparticle by ion irradiation. Molecular dynamics simulations are carried out for the prototypic case of a metastable icosahedral Pt particle bombarded with He and Xe ions in the energy range of 0.1-10 keV. A single xenon impact can be used to melt the particle. It can also induce partial melting, which causes a collapse of the twin boundary structure in the solid part and transformation to single crystalline morphology. Under He irradiation, we observe a saturation of the vacancy concentration, but no untwinning.

引用

页数：4

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