Potential energy threshold for nano-hillock formation by impact of slow highly charged ions on a CaF2(1 1 1) surface

A. S. El-Said, W. Meissl, M. C. Simon, J. R. Crespo López-Urrutia, C. Lemell, J. Burgdörfer, I. C. Gebeshuber, HP Winter, J. Ullrich, C. Trautmann, M. Toulemonde, F. Aumayr

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We investigate the formation of nano-sized hillocks on the (1 1 1) surface of CaF2 single crystals by impact of slow highly charged ions. Atomic force microscopy reveals a surprisingly sharp and well-defined threshold of potential energy carried into the collision of about 14 keV for hillock formation. Estimates of the energy density deposited suggest that the threshold is linked to a solid-liquid phase transition ("melting") on the nanoscale. With increasing potential energy, both the basal diameter and the height of the hillocks increase. The present results reveal a remarkable similarity between the present predominantly potential energy driven process and track formation by the thermal spike of swift (∼GeV) heavy ions.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume258
Issue number1
DOIs
Publication statusPublished - May 2007
Externally publishedYes

Fingerprint

Potential energy
potential energy
Ions
thresholds
Heavy Ions
ions
Heavy ions
spikes
Atomic force microscopy
heavy ions
liquid phases
Melting
flux density
Phase transitions
melting
Single crystals
atomic force microscopy
collisions
single crystals
Liquids

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

Potential energy threshold for nano-hillock formation by impact of slow highly charged ions on a CaF2(1 1 1) surface. / El-Said, A. S.; Meissl, W.; Simon, M. C.; Crespo López-Urrutia, J. R.; Lemell, C.; Burgdörfer, J.; Gebeshuber, I. C.; Winter, HP; Ullrich, J.; Trautmann, C.; Toulemonde, M.; Aumayr, F.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 258, No. 1, 05.2007, p. 167-171.

Research output: Contribution to journalArticle

El-Said, AS, Meissl, W, Simon, MC, Crespo López-Urrutia, JR, Lemell, C, Burgdörfer, J, Gebeshuber, IC, Winter, HP, Ullrich, J, Trautmann, C, Toulemonde, M & Aumayr, F 2007, 'Potential energy threshold for nano-hillock formation by impact of slow highly charged ions on a CaF2(1 1 1) surface', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 258, no. 1, pp. 167-171. https://doi.org/10.1016/j.nimb.2006.12.142
El-Said, A. S. ; Meissl, W. ; Simon, M. C. ; Crespo López-Urrutia, J. R. ; Lemell, C. ; Burgdörfer, J. ; Gebeshuber, I. C. ; Winter, HP ; Ullrich, J. ; Trautmann, C. ; Toulemonde, M. ; Aumayr, F. / Potential energy threshold for nano-hillock formation by impact of slow highly charged ions on a CaF2(1 1 1) surface. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2007 ; Vol. 258, No. 1. pp. 167-171.
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