Tolvanen, A. ; Kotakoski, J. ; Krasheninnikov, A. V. ; Nordlund, K. (2007)
Relative abundance of single and double vacancies in irradiated single-walled carbon nanotubes.
In: Appl. Phys. Lett., 91 (17)
doi: 10.1063/1.2800807
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Double and single vacancies differently affect the conductance of carbon nanotubes {\}G. Gomez-Navarro et al., Nat. Mater. 4, 534 (2005), so that the exact knowledge of the abundance of these defects is mandatory for an unambiguous interpretation of irradiation-induced changes in nanotube conductance. We calculate concentrations of defects produced by Ar ions using the molecular dynamics method combined with kinetic Monte Carlo simulations. Carefully taking into account the annealing of defects, we show that the ratio of single to double vacancies has a minimum at ion energies of about 0.5 keV and that the ratio saturates toward a constant value at high ion energies. (C) 2007 American Institute of Physics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Tolvanen, A. ; Kotakoski, J. ; Krasheninnikov, A. V. ; Nordlund, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | Relative abundance of single and double vacancies in irradiated single-walled carbon nanotubes |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Oktober 2007 |
| Verlag: | American Institute of Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Appl. Phys. Lett. |
| Jahrgang/Volume einer Zeitschrift: | 91 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1063/1.2800807 |
| Kurzbeschreibung (Abstract): | Double and single vacancies differently affect the conductance of carbon nanotubes {\}G. Gomez-Navarro et al., Nat. Mater. 4, 534 (2005), so that the exact knowledge of the abundance of these defects is mandatory for an unambiguous interpretation of irradiation-induced changes in nanotube conductance. We calculate concentrations of defects produced by Ar ions using the molecular dynamics method combined with kinetic Monte Carlo simulations. Carefully taking into account the annealing of defects, we show that the ratio of single to double vacancies has a minimum at ion energies of about 0.5 keV and that the ratio saturates toward a constant value at high ion energies. (C) 2007 American Institute of Physics. |
| Freie Schlagworte: | argon, carbon nanotubes, electrical conductivity, ion beam effects, molecular dynamics method, Monte Carlo methods, vacancies (crystal) |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 22 Feb 2012 16:23 |
| Letzte Änderung: | 25 Apr 2016 08:06 |
| PPN: | |
| Sponsoren: | We would like to thank the Academy of Finland for the support of the research described in this article through the Centres of Excellence Programme and the Finnish Center for Scientific Computing for generous grants of computer time. |
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