Liu , J , Muinos , H V , Nordlund , K & Djurabekova , F 2020 , ' Molecular dynamics simulation of the effects of swift heavy ion irradiation on multilayer graphene and diamond-like carbon ' , Applied Surface Science , vol. 527 , 146495 . https://doi.org/10.1016/j.apsusc.2020.146495
Title: | Molecular dynamics simulation of the effects of swift heavy ion irradiation on multilayer graphene and diamond-like carbon |
Author: | Liu, Jian; Muinos, Henrique Vazquez; Nordlund, Kai; Djurabekova, Flyura |
Contributor organization: | Department of Physics Helsinki Institute of Physics |
Date: | 2020-10-15 |
Language: | eng |
Number of pages: | 9 |
Belongs to series: | Applied Surface Science |
ISSN: | 0169-4332 |
DOI: | https://doi.org/10.1016/j.apsusc.2020.146495 |
URI: | http://hdl.handle.net/10138/319459 |
Abstract: | As a promising material used in accelerators and in space in the future, it is important to study the property and structural changes of graphene and diamond-like carbon on the surface as a protective layer before and after swift heavy ion irradiation, although this layer could have a loose structure due to the intrinsic sp(2) surrounding environment of graphene during its deposition period. In this study, by utilizing inelastic thermal spike model and molecular dynamics, we simulated swift heavy ion irradiation and examined the track radius in the vertical direction, as well as temperature, density, and sp(3) fraction distribution along the radius from the irradiation center at different time after irradiation. The temperature in the irradiation center can reach over 11000 K at the beginning of irradiation while there would be a low density and sp(3) fraction area left in the central region after 100 ps. Ring analysis also demonstrated a more chaotic cylindrical region in the center after irradiation. After comprehensive consideration, diamond-like carbon deposited by 70 eV carbon bombardment provided the best protection. |
Subject: |
Multilayer graphene
Diamond-like carbon Inelastic thermal spike model Molecular dynamics CHEMICAL-VAPOR-DEPOSITION AMORPHOUS-CARBON FILMS GRAPHITIZATION TRANSPARENT BOMBARDMENT EMISSION STRESS TRACKS 116 Chemical sciences 114 Physical sciences |
Peer reviewed: | Yes |
Rights: | cc_by_nc_nd |
Usage restriction: | openAccess |
Self-archived version: | acceptedVersion |
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