ION IRRADIATION EFFECTS AND ION BEAM STUDIES OF SEMICONDUCTOR MULTILAYERS

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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Ion irradiation effects on a magnetic Si/Ni/Si trilayer and lateral magnetic–nonmagnetic multistrip patterning by focused ion beam

Indian Journal of Physics ◽

10.1007/s12648-017-1025-z ◽

2017 ◽

Vol 91 (10) ◽

pp. 1167-1172 ◽

Cited By ~ 3

Author(s):

B. N. Dev ◽

Nasrin Banu ◽

J. Fassbender ◽

J. Grenzer ◽

N. Schell ◽

...

Keyword(s):

Focused Ion Beam ◽

Ion Irradiation ◽

Ion Beam ◽

Irradiation Effects

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In Situ Transmission Electron Microscope Studies of Ion Irradiation-Induced and Irradiation-Enhanced Phase Changes

MRS Proceedings ◽

10.1557/proc-235-451 ◽

1991 ◽

Vol 235 ◽

Cited By ~ 3

Author(s):

Charles W. Allen

Keyword(s):

Materials Science ◽

Ion Irradiation ◽

Ion Beam ◽

Phase Changes ◽

In Situ Tem ◽

Irradiation Effects ◽

Transmission Electron ◽

In Situ Experiments ◽

Electron Microscopes

ABSTRACTMotivated at least initially by materials needs for nuclear reactor development, extensive irradiation effects studies employing transmission electron microscopes (TEM) have been performed for several decades, involving irradiation-induced and irradiation-enhanced microstructural changes, including phase transformations such as precipitation, dissolution, crystallization, amorphization, and order-disorder phenomena. From the introduction of commercial high voltage electron microscopes (HVEM) in the mid-1960s, studies of electron irradiation effects have constituted a major aspect of HVEM application in materials science. For irradiation effects studies two additional developments have had particularly significant impact; (1) the development of TEM specimen holders in which specimen temperature can be controlled in the range 10–2200 K and (2) the interfacing of ion accelerators which allows in situ TEM studies of irradiation effects and the ion beam modification of materials within this broad temperature range. This paper treats several aspects of in situ studies of electron and ion beam-induced and enhanced phase changes and presents two case studies involving in situ experiments performed in an HVEM to illustrate the strategies of such an approach of the materials research of irradiation effects.

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Fundamental study of ion-irradiation effects on the columnar growth of chromium films prepared by ion-beam and vapor deposition

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.1335835 ◽

2001 ◽

Vol 19 (1) ◽

pp. 153-157 ◽

Cited By ~ 12

Author(s):

Naoto Kuratani ◽

Akinori Ebe ◽

Kiyoshi Ogata ◽

Ippei Shimizu ◽

Yuichi Setsuhara ◽

...

Keyword(s):

Vapor Deposition ◽

Ion Irradiation ◽

Ion Beam ◽

Irradiation Effects ◽

Columnar Growth ◽

Fundamental Study ◽

Chromium Films

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Investigation of Ion Irradiation Effects in Silicon and Graphite Produced by 23 MeV I Beam

Materials ◽

10.3390/ma14081904 ◽

2021 ◽

Vol 14 (8) ◽

pp. 1904

Author(s):

Kristina Tomić Luketić ◽

Marko Karlušić ◽

Andreja Gajović ◽

Stjepko Fazinić ◽

Jacques H. O’Connell ◽

...

Keyword(s):

Ion Irradiation ◽

Ion Beam ◽

Heavy Ion ◽

Irradiation Damage ◽

Irradiation Effects ◽

Force Microscopy ◽

Ion Channeling ◽

Swift Heavy Ion ◽

Low Energies ◽

Radiation Hard

Both silicon and graphite are radiation hard materials with respect to swift heavy ions like fission fragments and cosmic rays. Recrystallisation is considered to be the main mechanism of prompt damage anneal in these two materials, resulting in negligible amounts of damage produced, even when exposed to high ion fluences. In this work we present evidence that these two materials could be susceptible to swift heavy ion irradiation effects even at low energies. In the case of silicon, ion channeling and electron microscopy measurements reveal significant recovery of pre-existing defects when exposed to a swift heavy ion beam. In the case of graphite, by using ion channeling, Raman spectroscopy and atomic force microscopy, we found that the surface of the material is more prone to irradiation damage than the bulk.

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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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Heavy Ion Irradiation Effects on Cadmium Oxide (CdO) Quantum Dots Prepared by Quenching Method

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.10.69 ◽

2010 ◽

Vol 10 ◽

pp. 69-76 ◽

Cited By ~ 2

Author(s):

Hardev Singh Virk ◽

Poonam Sharma

Keyword(s):

Quantum Dots ◽

Ion Irradiation ◽

Ion Beam ◽

Cadmium Oxide ◽

Heavy Ion ◽

Industrial Applications ◽

X Ray Diffraction ◽

Irradiation Effects ◽

Heavy Ion Irradiation ◽

Quenching Method

Cadmium oxide (CdO) quantum dots were synthesized in the laboratory by quenching method using CdO powder sintered at 9000C and ethyl alcohol kept at ice cold temperature. X-ray diffraction investigations reveal the NaCl cubic structure of CdO quantum dots. Addition of ethylenediamine to a portion of reaction mixture containing quantum dots results in the conversion of nanoparticles to nanorods. Heavy ion irradiation using 90 MeV Carbon (C+6) ion beam accelerated at 15 UD Pelletron, with fluence varying from 1011 to 1013 ions/cm2 , produced enlargement in the size of quantum dots revealed by TEM investigations. Heavy ion irradiation effects need to be investigated further, in view of industrial applications of quantum dots.

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Silicon ion irradiation effects on the magnetic properties of ion beam synthesized CoPt phase

10.1063/1.4710215 ◽

2012 ◽

Author(s):

S. Balaji ◽

S. Amirthapandian ◽

B. K. Panigrahi ◽

G. Mangamma ◽

S. Kalavathi ◽

...

Keyword(s):

Magnetic Properties ◽

Ion Irradiation ◽

Ion Beam ◽

Irradiation Effects

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Electron and ion irradiation-induced dissolution of mechanical twins in the intermetalic U3Si: An in situ HVEM study

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100155232 ◽

1989 ◽

Vol 47 ◽

pp. 652-653

Author(s):

Charles W. Allen ◽

Robert C. Birtcher

Keyword(s):

Elevated Temperatures ◽

Ion Irradiation ◽

Ion Beam ◽

National Laboratory ◽

Argonne National Laboratory ◽

Heavy Ion ◽

High Energy ◽

Mechanical Twinning ◽

In Situ Experiments

The uranium silicides, including U3Si, are under study as candidate low enrichment nuclear fuels. Ion beam simulations of the in-reactor behavior of such materials are performed because a similar damage structure can be produced in hours by energetic heavy ions which requires years in actual reactor tests. This contribution treats one aspect of the microstructural behavior of U3Si under high energy electron irradiation and low dose energetic heavy ion irradiation and is based on in situ experiments, performed at the HVEM-Tandem User Facility at Argonne National Laboratory. This Facility interfaces a 2 MV Tandem ion accelerator and a 0.6 MV ion implanter to a 1.2 MeV AEI high voltage electron microscope, which allows a wide variety of in situ ion beam experiments to be performed with simultaneous irradiation and electron microscopy or diffraction.At elevated temperatures, U3Si exhibits the ordered AuCu3 structure. On cooling below 1058 K, the intermetallic transforms, evidently martensitically, to a body-centered tetragonal structure (alternatively, the structure may be described as face-centered tetragonal, which would be fcc except for a 1 pet tetragonal distortion). Mechanical twinning accompanies the transformation; however, diferences between electron diffraction patterns from twinned and non-twinned martensite plates could not be distinguished.

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