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

doi:10.1016/j.nimb.2006.12.142

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

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 language	English
Pages (from-to)	167-171
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	258
Issue number	1
DOIs	https://doi.org/10.1016/j.nimb.2006.12.142
State	Published - May 2007
Externally published	Yes

Bibliographical note

Funding Information:
This work has been supported by Austrian Science Foundation FWF (Projects No. 17449 and M894-N02). The irradiation experiments were performed at the distributed ITS-LEIF-Infrastructure at MPI Heidelberg Germany, supported by Transnational Access granted by the European Project RII3#026015.

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nimb.2006.12.142

Cite this

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. (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, 258(1), 167-171. https://doi.org/10.1016/j.nimb.2006.12.142

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

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.",

author = "El-Said, \{A. S.\} and W. Meissl and Simon, \{M. C.\} and \{Crespo L{\'o}pez-Urrutia\}, \{J. R.\} and C. Lemell and J. Burgd{\"o}rfer and Gebeshuber, \{I. C.\} and HP Winter and J. Ullrich and C. Trautmann and M. Toulemonde and F. Aumayr",

note = "Funding Information: This work has been supported by Austrian Science Foundation FWF (Projects No. 17449 and M894-N02). The irradiation experiments were performed at the distributed ITS-LEIF-Infrastructure at MPI Heidelberg Germany, supported by Transnational Access granted by the European Project RII3\#026015.",

year = "2007",

month = may,

doi = "10.1016/j.nimb.2006.12.142",

language = "English",

volume = "258",

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journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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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

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. et al.
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 journal › Article › peer-review

TY - JOUR

T1 - Potential energy threshold for nano-hillock formation by impact of slow highly charged ions on a CaF2(1 1 1) surface

AU - El-Said, A. S.

AU - Meissl, W.

AU - Simon, M. C.

AU - Crespo López-Urrutia, J. R.

AU - Lemell, C.

AU - Burgdörfer, J.

AU - Gebeshuber, I. C.

AU - Winter, HP

AU - Ullrich, J.

AU - Trautmann, C.

AU - Toulemonde, M.

AU - Aumayr, F.

N1 - Funding Information: This work has been supported by Austrian Science Foundation FWF (Projects No. 17449 and M894-N02). The irradiation experiments were performed at the distributed ITS-LEIF-Infrastructure at MPI Heidelberg Germany, supported by Transnational Access granted by the European Project RII3#026015.

PY - 2007/5

Y1 - 2007/5

N2 - 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.

AB - 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.

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El-Said AS, Meissl W, Simon MC, Crespo López-Urrutia JR, Lemell C, Burgdörfer J et al. 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. 2007 May;258(1):167-171. doi: 10.1016/j.nimb.2006.12.142