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Sputtering yields exceeding 1000 by 80keV Xe irradiation of Au nanorods

Ilinov, A, Kuronen, A, Nordlund, K, Greaves, G, Hinks, J, Busby, P, Mellors, NJ and Donnelly, SE 2014, 'Sputtering yields exceeding 1000 by 80keV Xe irradiation of Au nanorods' , Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 341 , pp. 17-21.

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Abstract

Using experiments and computer simulations, we find that 80 keV Xe ion irradiation of Au nanorods can produce sputtering yields exceeding 1000, which to our knowledge are the highest yields reported for sputtering by single ions in the nuclear collision regime. This value is enhanced by more than an order of magnitude compared to the same irradiation of flat Au surfaces. Using MD simulations, we show that the very high yield can be understood as a combination of enhanced yields due to low incoming angles at the sides of the nanowire, as well as the high surface-to-volume ratio causing enhanced explosive sputtering from heat spikes. We also find, both in experiments and simulations, that channeling has a strong effect on the sputtering yield: if the incoming beam happens to be aligned with a crystal axis of the nanorod, the yield can decrease to about 100.

Item Type: Article
Themes: Energy
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Publisher: Elsevier
Refereed: Yes
ISSN: 0168-583X
Funders: Non funded research
Depositing User: NJ Mellors
Date Deposited: 29 Apr 2015 11:56
Last Modified: 05 Apr 2016 18:19
URI: http://usir.salford.ac.uk/id/eprint/33556

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