Jaervi, T. T. ; Pohl, D. ; Albe, K. ; Rellinghaus, B. ; Schultz, L. ; Fassbender, J. ; Kuronen, A. ; Nordlund, K. (2009)
From multiply twinned to fcc nanoparticles via irradiation-induced transient amorphization.
In: Europhys. Lett., 85 (2)
doi: 10.1209/0295-5075/85/26001
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present experimental evidence for structural transformation of multiply twinned CuAu nanoparticles to single-crystalline morphology by 0.5 keV helium irradiation. This finding is unexpected as the stability of twin boundaries should not be affected by ion-beam-induced Frenkel pairs. Molecular-dynamics simulations reveal, however, a new transformation mechanism based on transient amorphization of the particle. By comparing with irradiation simulations of elemental nanoparticles, as well as alloyed bulk samples and surface cascades, we show that this transformation route is only present in alloyed particles. Moreover, the observed amorphization is more efficient for twinned than single-crystalline particles. This, together with the fast recrystallization kinetics in CuAu, explains the experimentally observed untwinning process. Copyright (C) EPLA, 2009
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Jaervi, T. T. ; Pohl, D. ; Albe, K. ; Rellinghaus, B. ; Schultz, L. ; Fassbender, J. ; Kuronen, A. ; Nordlund, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | From multiply twinned to fcc nanoparticles via irradiation-induced transient amorphization |
| Sprache: | Englisch |
| Publikationsjahr: | 22 Januar 2009 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Europhys. Lett. |
| Jahrgang/Volume einer Zeitschrift: | 85 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1209/0295-5075/85/26001 |
| URL / URN: | http://iopscience.iop.org/0295-5075/85/2/26001/ |
| Kurzbeschreibung (Abstract): | We present experimental evidence for structural transformation of multiply twinned CuAu nanoparticles to single-crystalline morphology by 0.5 keV helium irradiation. This finding is unexpected as the stability of twin boundaries should not be affected by ion-beam-induced Frenkel pairs. Molecular-dynamics simulations reveal, however, a new transformation mechanism based on transient amorphization of the particle. By comparing with irradiation simulations of elemental nanoparticles, as well as alloyed bulk samples and surface cascades, we show that this transformation route is only present in alloyed particles. Moreover, the observed amorphization is more efficient for twinned than single-crystalline particles. This, together with the fast recrystallization kinetics in CuAu, explains the experimentally observed untwinning process. Copyright (C) EPLA, 2009 |
| Freie Schlagworte: | Semiconductors, Nanoscale science and low-D systems, structural, mechanical & thermal |
| 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 14:55 |
| Letzte Änderung: | 25 Apr 2016 08:46 |
| PPN: | |
| Sponsoren: | A part of this work was performed within the Finnish Centre of Excellence in Computational Molecular Science (CMS)., We also gratefully acknowledge support within an exhange 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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