Swift Heavy Ion Shape Transformation of Au Nanocrystals Mediated by Molten Material Flow and Recrystallization

被引：36

作者：

Leino, A. A. ^{[1
,2
]}

Pakarinen, O. H. ^{[1
,2
]}

Djurabekova, F. ^{[1
,2
]}

Nordlund, K. ^{[1
,2
]}

Kluth, P. ^{[3
]}

Ridgway, M. C. ^{[3
]}

机构：

[1] Univ Helsinki, Helsinki Inst Phys, POB 43, FI-00014 Helsinki, Finland

[2] Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland

[3] Australian Natl Univ, Dept Elect Mat Engn, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

来源：

MATERIALS RESEARCH LETTERS | 2014年 / 2卷 / 01期

基金：

澳大利亚研究理事会; 芬兰科学院;

关键词：

Nanoparticles; Nanocrystals; Elongation; Swift Heavy Ions; Silica; MOLECULAR-DYNAMICS; NANOPARTICLES; DEFORMATION; IRRADIATION; TRACKS; GOLD; SIO2;

D O I：

10.1080/21663831.2013.856816

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Swift heavy ion (SHI) irradiation of amorphous SiO2 that contains metal nanocrystals can be used to transform the shape of the particles into peculiar asymmetric ones not easily achievable by other means. Using a molecular dynamics simulation framework augmented to include the electronic excitations of the SHIs, we predict that the reshaping of spherical particles into nanorods occurs continuously during consecutive ion impacts by a dynamic crystal-liquid-crystal phase transition of metal particle with the flow of liquid phase into an underdense track core in silica. The simulated nanocrystals are shown to have a saturation width that agrees with experiments.

引用

页码：37 / 42

页数：6

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