Damage production in nanoparticles under light ion irradiation
Phys. Rev. B 80 (13), 132101, October 2009
Submitted to Cluster Science: 8 October 2009
Last Update: 6 January 2011

10.1103/PhysRevB.80.132101
OA Status: can archive pre-print and post-print or publisher's version/PDF

Abstract

Modifying the properties of nanoparticles by ion irradiation leads to sputtering and defect production, possibly enhanced by the high surface-to-volume ratio of the irradiated objects. By molecular-dynamics simulations, we address the size dependence of platinum nanoparticles’ response to light ion irradiation and show that in contrast to irradiation by heavier ions the sputtering yield does not depend on the particle size. In contrast, very high vacancy concentrations can be obtained in nanoparticles, the maximal concentration depending on the particle size. The evolution of vacancy concentration and sputtering upon irradiation are rationalized in terms of a kinetic model based on single knock-on events.

Classifications

Document Type theoretical
Research Field Charging Phenomena, Collisions and Fragmentation Processes

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