Volume 82, Number 2, April 2008
|Number of page(s)||4|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||28 March 2008|
Enhanced sputtering from nanoparticles and thin films: Size effects
Department of Physics, University of Helsinki - P.O. Box 43, FI-00014, Finland, EU
Corresponding author: email@example.com
Accepted: 4 March 2008
Sputtering of gold nanoparticles and nanometer-thin films under 25 keV gallium-ion bombardment is shown, using molecular-dynamics simulations, to be significantly enhanced compared to bulk. The highest yield, about three times that of bulk gold, occurs for particles of about 8 nm in diameter. For thin films, the maximal yield is obtained for roughly 3 nm thick films. A model based on the work of Sigmund is presented to explain the size-dependence.
PACS: 61.46.Df – Structure of nanocrystals and nanoparticles (“colloidal” quantum dots but not gate-isolated embedded quantum dots) / 68.49.Sf – Ion scattering from surfaces (charge transfer, sputtering, SIMS) / 61.82.Rx – Nanocrystalline materials
© EPLA, 2008
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