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Surface nanostructuring of LiNbO3 by high-density electronic excitations

El-Said, A. S. and Wilhelm, R. A. and Facsko, S. and Trautmann, C. (2013):
Surface nanostructuring of LiNbO3 by high-density electronic excitations.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier Science Publishing, pp. 265-268, 315, ISSN 0168583X, [Online-Edition: http://dx.doi.org/10.1016/j.nimb.2013.03.008],
[Article]

Abstract

Lithium niobate (LiNbO3) single crystals were irradiated with high energy gold ions (0.5–2.2 GeV) at the UNILAC (GSI) and with 150-keV highly charged xenon ions from an EBIT (Electron Beam Ion Trap, HZDR). The surfaces of the irradiated crystals were analyzed by scanning force microscopy showing very similar topographic changes. Swift heavy ions and slow highly charged ions produce hillock-like nanostructures on the surface. In both cases, the energy deposition of the ions is characterized by dense localized electronic excitations and efficient transfer to the lattice. Furthermore, the irradiation results in a shift in the band gap energy as evidenced by UV–Vis absorption spectroscopy. Specific modifications (e.g. hillock size, energy loss threshold) induced by slow highly charged ions are discussed in comparison with effects due to the electronic energy loss by swift heavy ions.

Item Type: Article
Erschienen: 2013
Creators: El-Said, A. S. and Wilhelm, R. A. and Facsko, S. and Trautmann, C.
Title: Surface nanostructuring of LiNbO3 by high-density electronic excitations
Language: English
Abstract:

Lithium niobate (LiNbO3) single crystals were irradiated with high energy gold ions (0.5–2.2 GeV) at the UNILAC (GSI) and with 150-keV highly charged xenon ions from an EBIT (Electron Beam Ion Trap, HZDR). The surfaces of the irradiated crystals were analyzed by scanning force microscopy showing very similar topographic changes. Swift heavy ions and slow highly charged ions produce hillock-like nanostructures on the surface. In both cases, the energy deposition of the ions is characterized by dense localized electronic excitations and efficient transfer to the lattice. Furthermore, the irradiation results in a shift in the band gap energy as evidenced by UV–Vis absorption spectroscopy. Specific modifications (e.g. hillock size, energy loss threshold) induced by slow highly charged ions are discussed in comparison with effects due to the electronic energy loss by swift heavy ions.

Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume: 315
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Ion-surface interaction, Swift heavy ions, Highly charged ions, Energy loss
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 21 Mar 2014 13:21
Official URL: http://dx.doi.org/10.1016/j.nimb.2013.03.008
Additional Information:

25th International Conference on Atomic Collisions in Solids (ICACS-25)

Identification Number: doi:10.1016/j.nimb.2013.03.008
Funders: The support by KFUPM (Project No. SB111006) and Alexander von Humboldt Foundation is greatly acknowledged. , RAW acknowledges the DFG for financial support under project number HE 6174/1-1.
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