Modification of nanodiamonds by xenon implantation: A molecular dynamics study

Jason L. Fogg, Alireza Aghajamali, Jonathan A. Hinks, Stephen E. Donnelly, Andrey A. Shiryaev, Nigel A. Marks

Research output: Contribution to journalArticle

Abstract

Xenon implantation into nanodiamonds is studied using molecular dynamics. The nanodiamonds range in size from 2 to 10 nm and the implantation energy extends up to 40 keV. For small nanodiamonds an energy-window effect occurs in which xenon energies of around 6 keV destroy the nanodiamond, while in larger nanodiamonds the radiation cascade is increasingly similar to those in bulk material. Destruction of the small nanodiamonds occurs due to thermal annealing associated with the small size of the particles and the absence of a heat-loss path. Simulations are also performed for a range of impact parameters, and for a series of double-nanodiamond systems in which a heat-loss path is present. The latter show that the thermal shock caused by the impact occurs on the timescale of a few picoseconds. These findings are relevant to ion-beam modification of nanoparticles by noble gases as well as astrophysics studies where implantation is proposed as the mechanism for xenon incorporation in pre-solar nanodiamonds.

LanguageEnglish
Pages32-40
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume453
Early online date5 Jun 2019
DOIs
Publication statusPublished - 15 Aug 2019

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Nanodiamonds
Xenon
xenon
Molecular dynamics
implantation
molecular dynamics
heat
thermal shock
destruction
energy
rare gases
astrophysics
cascades
Heat losses
ion beams
nanoparticles
annealing
radiation
Astrophysics
Thermal shock

Cite this

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title = "Modification of nanodiamonds by xenon implantation: A molecular dynamics study",
abstract = "Xenon implantation into nanodiamonds is studied using molecular dynamics. The nanodiamonds range in size from 2 to 10 nm and the implantation energy extends up to 40 keV. For small nanodiamonds an energy-window effect occurs in which xenon energies of around 6 keV destroy the nanodiamond, while in larger nanodiamonds the radiation cascade is increasingly similar to those in bulk material. Destruction of the small nanodiamonds occurs due to thermal annealing associated with the small size of the particles and the absence of a heat-loss path. Simulations are also performed for a range of impact parameters, and for a series of double-nanodiamond systems in which a heat-loss path is present. The latter show that the thermal shock caused by the impact occurs on the timescale of a few picoseconds. These findings are relevant to ion-beam modification of nanoparticles by noble gases as well as astrophysics studies where implantation is proposed as the mechanism for xenon incorporation in pre-solar nanodiamonds.",
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Modification of nanodiamonds by xenon implantation : A molecular dynamics study. / Fogg, Jason L.; Aghajamali, Alireza; Hinks, Jonathan A.; Donnelly, Stephen E.; Shiryaev, Andrey A.; Marks, Nigel A.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 453, 15.08.2019, p. 32-40.

Research output: Contribution to journalArticle

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AU - Fogg, Jason L.

AU - Aghajamali, Alireza

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AU - Marks, Nigel A.

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