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

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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