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

Ilinov, A., Kuronen, A., Nordlund, K., Greaves, Graeme, Hinks, J. A., Busby, P., Mellors, N.J. and Donnelly, S. E. (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. ISSN 0168-583X

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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
Subjects: Q Science > QC Physics
Schools: School of Computing and Engineering
School of Computing and Engineering > Electron Microscopy and Materials Analysis
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Depositing User: Graeme Greaves
Date Deposited: 02 Oct 2014 11:25
Last Modified: 28 Aug 2021 19:07


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