Jarvi, T. T. ; Kuronen, A. ; Nordlund, K. ; Albe, K. (2007)
Structural modification of a multiply twinned nanoparticle by ion irradiation: A molecular dynamics study.
In: J. Applied Physics, 102 (12)
doi: 10.1063/1.2825045
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Jarvi, T. T. ; Kuronen, A. ; Nordlund, K. ; Albe, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | Structural modification of a multiply twinned nanoparticle by ion irradiation: A molecular dynamics study |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Dezember 2007 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | J. Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 102 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1063/1.2825045 |
| URL / URN: | http://jap.aip.org/resource/1/japiau/v102/i12/p124304_s1 |
| Kurzbeschreibung (Abstract): | 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. |
| Freie Schlagworte: | crystal morphology, impurities, ion-surface impact, molecular dynamics method, nanostructured materials, platinum, twin boundaries |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 28 Feb 2012 14:53 |
| Letzte Änderung: | 25 Apr 2016 08:47 |
| PPN: | |
| Sponsoren: | This work was financed by the Academy of Finland and the University of Helsinki., We also gratefully acknowledge support within an exchange program from the Academy of Finland and the German Foreign Exchange Service �DAAD�, as well as the grants of computer time from CSC, the Finnish IT Centre for Science. |
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