The Influence of Copper Substrates on Irradiation Effects of Graphene: A Molecular Dynamics Study

In this paper, classical molecular dynamics simulations are conducted to study the graphene grown on copper substrates under ion beam irradiation, in which the emphasis is put on the influence copper substrate on a single graphene layer. It can be inferred that the actual transmission and distribution of kinetic energy from incident ion play important roles in irradiation-defects forming process together. The minimum value needed to generate defects in supported graphene is higher than 2.67 keV, which is almost twice the damage threshold as the suspended graphene sheet. This work indicates the presence of copper substrate increases the damage threshold of graphene. Additionally, our results provide an atomistic explanation for the graphene with copper substrate under ion irradiation, which is very important for engineering graphene.

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514 Molecular Dynamics Simulations of the Ion Irradiation Effects on the C_ film

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2005.80._5-33_ ◽

2005 ◽

Vol 2005.80 (0) ◽

pp. _5-33_-_5-34_

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulations ◽

Ion Irradiation ◽

Irradiation Effects ◽

Dynamics Simulations

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Molecular dynamics simulations of electron and ion beam irradiation of multiwalled carbon nanotubes: The effects on failure by inner tube sliding

Physical Review B ◽

10.1103/physrevb.73.224106 ◽

2006 ◽

Vol 73 (22) ◽

Cited By ~ 45

Author(s):

Sharon K. Pregler ◽

Susan B. Sinnott

Keyword(s):

Carbon Nanotubes ◽

Molecular Dynamics ◽

Molecular Dynamics Simulations ◽

Multiwalled Carbon Nanotubes ◽

Ion Beam ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Multiwalled Carbon ◽

Dynamics Simulations

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Enhancing the Surface Properties and Structure of MWNTs by Effective Ion Beam Irradiation

Nanoarchitectonics ◽

10.37256/nat.2220211003 ◽

2021 ◽

pp. 101-108

Author(s):

Emad M. Elsehly ◽

Nikolay G. Chechenin ◽

Andrey A. Shemukhin ◽

Hussien A. Motaweh

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Ion Irradiation ◽

Ion Beam ◽

Amorphous State ◽

Beam Irradiation ◽

Irradiation Effects ◽

Ion Beam Irradiation ◽

Multiwalled Carbon ◽

Scanning Electron

The effects of irradiating multiwalled carbon nanotubes (MWNTs) with 100 keV He ions on the surface morphology were examined. Due to irradiation effects, the tube diameter reduced as revealed by scanning electron microscopy (SEM). Raman spectroscopy was used to investigate MWNTs by analyzing the principal bands in the spectra of virgin and radiated MWNT specimens. The effects of irradiation fluences on the disorder (D-band) and the graphite (G-band) modes were investigated. The possibility and prospects of using ion irradiation for controlling the wettability of the MWNT surface were investigated. The irradiation facility produces an MWNT coating that is either hydrophobic or hydrophilic to certain liquids. This analysis demonstrates that ion beam irradiation could be used as an alternative tool to change the structure of CNT and enhancing their wettability application, especially in water treatment. According to Raman spectra, when the fluence increases, the MWNTs become disordered due to the defect produced. The amorphous state of MWNTs could be attained with greater ion irradiation fluences.

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Comparison of Ion-Beam Irradiation Effects in X2YO4 Compounds

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1999.tb02246.x ◽

2004 ◽

Vol 82 (12) ◽

pp. 3321-3329 ◽

Cited By ~ 24

Author(s):

LuMin Wang ◽

WeiLang Gong ◽

ShiXin Wang ◽

Rodney C. Ewing

Keyword(s):

Ion Beam ◽

Beam Irradiation ◽

Irradiation Effects ◽

Ion Beam Irradiation

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Growth of Cu-Oxide Protrusion by Ar Ion Irradiation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.558-559.1359 ◽

2007 ◽

Vol 558-559 ◽

pp. 1359-1362 ◽

Cited By ~ 2

Author(s):

Hiroyuki Tanaka ◽

Shunichiro Tanaka

Keyword(s):

Ion Irradiation ◽

Ion Beam ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Residual Oxygen ◽

Irradiation Angle ◽

Oxygen Atoms

Cu2O conical micron-scale protrusions have been grown on a preoxidized Cu surface by the Ar ion beam irradiation at 9 kV for 5-20 min in the low vacuum. This Ar ion irradiation is based on the ‘Transcription Method’ which has been originated by B.-S. Xu and S.-I. Tanaka in 1996 to form nanoparticles. Ar ion irradiation induced needle-like nanostructures composed of Cu2O and CuO which were randomly nucleated on Cu surface by the oxidation at 623 K for 10 min in the air. The obtained Cu2O conical protrusions have a controllable length of up to 14.6 μm with diameter in the range of 0.8 μm by changing the Ar ion irradiation angle to the surface. The mechanism of the formation of the conical protrusions is proposed that Cu atoms on the Cu surface activated and sputtered by the Ar ion irradiation diffuse on the surface of needle-like oxide as nuclei along the Ar ion track and react with residual oxygen atoms to grow the conical Cu2O protrusions.

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Spontaneous formation of nanometer-scale self-organized structures in Ag-Cu alloys under irradiation

MRS Proceedings ◽

10.1557/proc-647-o7.1 ◽

2000 ◽

Vol 647 ◽

Author(s):

Raúl A. Enrique ◽

Pascal Bellon

Keyword(s):

Ion Irradiation ◽

Ion Beam ◽

Solute Concentration ◽

Irradiation Temperature ◽

Nanometer Scale ◽

Beam Irradiation ◽

X Ray Diffraction ◽

Ion Beam Irradiation ◽

Self Organized ◽

The One

AbstractIon-beam irradiation can be used as a processing tool to synthesize metastable materials. A particular case is the preparation of solid solutions from immiscible alloys, which have been achieved for a whole range of systems. In this process, enhanced solute concentration is obtained through the local mixing induced by each irradiation event, which if occurring at a high enough frequency, can outweigh demixing by thermal diffusion. The resulting microstructure forms in far from equilibrium conditions, and theoretical results for these kind of driven alloys have shown that novel microstructures exhibiting self-organization can develop. To test these predictions, we prepare Ag-Cu multilayered thin films that we subject to 1 MeV Kr+-ion irradiation at temperatures ranging from room temperature to 225 °C, and characterize the specimens by x-ray diffraction, TEM and STEM. We observe two different phenomena occurring at different length scales: On the one hand, regardless of the irradiation temperature, grains grow under irradiation until reaching a size limited by film thickness (~200 nm). On the other hand, the distribution of species inside the grains is greatly affected by the irradiation temperature. At intermediate temperatures, a semi-coherent decomposition is observed at a nanometer scale. This nanometer-scale decomposition phenomenon appears as an evidence of patterning, and thus confirms on the possibility of using ion-beam irradiation as a route to synthesize nanostructured materials with novel magnetic and optical properties.

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Fabrication of Nanopore in MoS2-Graphene vdW Heterostructure by Ion Beam Irradiation and the Mechanical Performance

Nanomaterials ◽

10.3390/nano12020196 ◽

2022 ◽

Vol 12 (2) ◽

pp. 196

Author(s):

Xin Wu ◽

Ruxue Yang ◽

Xiyue Chen ◽

Wei Liu

Keyword(s):

Mechanical Performance ◽

Ion Irradiation ◽

Ion Beam ◽

Tensile Tests ◽

Uniaxial Tensile ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Stacking Order ◽

Vdw Heterostructure ◽

Nanopore Structure

Nanopore structure presents great application potential especially in the area of biosensing. The two-dimensional (2D) vdW heterostructure nanopore shows unique features, while research around its fabrication is very limited. This paper proposes for the first time the use of ion beam irradiation for creating nanopore structure in 2D vdW graphene-MoS2 heterostructures. The formation process of the heterostructure nanopore is discussed first. Then, the influence of ion irradiation parameters (ion energy and ion dose) is illustrated, based on which the optimal irradiation parameters are derived. In particular, the effect of stacking order of the heterostructure 2D layers on the induced phenomena and optimal parameters are taken into consideration. Finally, uniaxial tensile tests are conducted by taking the effect of irradiation parameters, nanopore size and stacking order into account to demonstrate the mechanical performance of the heterostructure for use under a loading condition. The results would be meaningful for expanding the applications of heterostructure nanopore structure, and can arouse more research interest in this area.

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Amortization and Recrystallization of 6H-SiC by ion Beam Irradiation

MRS Proceedings ◽

10.1557/proc-339-197 ◽

1994 ◽

Vol 339 ◽

Cited By ~ 4

Author(s):

V. Heera ◽

R. Kögler ◽

W. Skorupa ◽

J. Stoemenos

Keyword(s):

Ion Irradiation ◽

Ion Beam ◽

Surface Region ◽

Ion Beam Irradiation ◽

Surface Layers ◽

Near Surface ◽

Transmission Electron ◽

Amorphous Surface ◽

Amorphous Sic

ABSTRACTThe evolution of the damage in the near surface region of single crystalline 6H-SiC generated by 200 keV Ge+ ion implantation at room temperature (RT) was investigated by Rutherford backscattering spectroscopy/chanelling (RBS/C). The threshold dose for amorphization was found to be about 3 · 1014 cm-2, Amorphous surface layers produced with Ge+ ion doses above the threshold were partly annealed by 300 keV Si+ ion beam induced epitaxial crystallization (IBIEC) at a relatively low temperature of 480°C For comparison, temperatures of at least 1450°C are necessary to recrystallize amorphous SiC layers without assisting ion irradiation. The structure and quality of both the amorphous and recrystallized layers were characterized by cross-section transmission electron microscopy (XTEM). Density changes of SiC due to amorphization were measured by step height measurements.

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