A study on the elongation of embedded Au nanoclusters in SiO2 by swift heavy ion irradiation using MD simulations

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Abstract

We have studied the elongation of Au nanoclusters embedded in amorphous SiO2 using MD simulations. The effect of swift heavy ions (SHI) was implemented using instantaneous energy deposition with a radial profile that was obtained from the inelastic thermal spike model. During the first impact on the cluster, the clusters (d = 9–11 nm) gained about 20% in length due to thermal stress within the cluster, which is released by a longitudinal flow of Au atoms to the ion track in silica. Our simulations also show that high temperatures at the track core lead to the formation of silica vapor, whose pressure may flatten the cluster.
Original languageEnglish
JournalNuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume282
Pages (from-to)76-80
Number of pages5
ISSN0168-583X
DOIs
Publication statusPublished - 2012
MoE publication typeA4 Article in conference proceedings
EventUnknown host publication - , Netherlands
Duration: 1 Jan 1800 → …

Fields of Science

  • 114 Physical sciences

Cite this

@article{2abe04e0f2ee4e6c815b6b6d4e3a3930,
title = "A study on the elongation of embedded Au nanoclusters in SiO2 by swift heavy ion irradiation using MD simulations",
abstract = "We have studied the elongation of Au nanoclusters embedded in amorphous SiO2 using MD simulations. The effect of swift heavy ions (SHI) was implemented using instantaneous energy deposition with a radial profile that was obtained from the inelastic thermal spike model. During the first impact on the cluster, the clusters (d = 9–11 nm) gained about 20{\%} in length due to thermal stress within the cluster, which is released by a longitudinal flow of Au atoms to the ion track in silica. Our simulations also show that high temperatures at the track core lead to the formation of silica vapor, whose pressure may flatten the cluster.",
keywords = "114 Physical sciences, molecular dynamics simulations, Ion-matter interactions, Elongation, NANOCLUSTERS, SILICA",
author = "Leino, {Aleksi Anssi Mikael} and Pakarinen, {Olli Heikki} and Flyura Djurabekova and Kai Nordlund",
note = "Volume: 282 Host publication title: E-MRS 2011 Proceedings Proceeding volume:",
year = "2012",
doi = "10.1016/j.nimb.2011.08.054",
language = "English",
volume = "282",
pages = "76--80",
journal = "Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier",

}

TY - JOUR

T1 - A study on the elongation of embedded Au nanoclusters in SiO2 by swift heavy ion irradiation using MD simulations

AU - Leino, Aleksi Anssi Mikael

AU - Pakarinen, Olli Heikki

AU - Djurabekova, Flyura

AU - Nordlund, Kai

N1 - Volume: 282 Host publication title: E-MRS 2011 Proceedings Proceeding volume:

PY - 2012

Y1 - 2012

N2 - We have studied the elongation of Au nanoclusters embedded in amorphous SiO2 using MD simulations. The effect of swift heavy ions (SHI) was implemented using instantaneous energy deposition with a radial profile that was obtained from the inelastic thermal spike model. During the first impact on the cluster, the clusters (d = 9–11 nm) gained about 20% in length due to thermal stress within the cluster, which is released by a longitudinal flow of Au atoms to the ion track in silica. Our simulations also show that high temperatures at the track core lead to the formation of silica vapor, whose pressure may flatten the cluster.

AB - We have studied the elongation of Au nanoclusters embedded in amorphous SiO2 using MD simulations. The effect of swift heavy ions (SHI) was implemented using instantaneous energy deposition with a radial profile that was obtained from the inelastic thermal spike model. During the first impact on the cluster, the clusters (d = 9–11 nm) gained about 20% in length due to thermal stress within the cluster, which is released by a longitudinal flow of Au atoms to the ion track in silica. Our simulations also show that high temperatures at the track core lead to the formation of silica vapor, whose pressure may flatten the cluster.

KW - 114 Physical sciences

KW - molecular dynamics simulations

KW - Ion-matter interactions

KW - Elongation

KW - NANOCLUSTERS

KW - SILICA

U2 - 10.1016/j.nimb.2011.08.054

DO - 10.1016/j.nimb.2011.08.054

M3 - Conference article

VL - 282

SP - 76

EP - 80

JO - Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

ER -