Evolution of the multi-walled carbon nanotubes structure with increasing fluence of He ion irradiation

Kushkina, K. D.; Shemukhin, A. A.; Vorobyeva, E. A.; Bukunov, Kirill A.; Evseev, A. V.; Tatarintsev, A. A.; Maslakov, K. I.; Чеченин, Н.Г.; Chernysh, V. S.

doi:10.1016/j.nimb.2018.05.038

Cited by 25 publications

(5 citation statements)

References 35 publications

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“…Honda et al reported that it is possible to synthetize the amorphous carbon nanorods from hollow MWCNTs by lowenergy Ar ion irradiation at room temperature [23]. When N + passes through MWCNTs it loses energy and destroys the lattice in an elastic collisions [21]. Therefore, the interconnections between CNTs in the structure created by ion irradiation can be created in two ways.…”

Section: Discussionmentioning

confidence: 99%

“…This is due to the formation of defects near surface layers of sp 2 carbon lattice. The defect formation mechanism depends not only on the morphology of MWCNTs but also on the parameters of irradiation process (beam intensity, fluence, energy and charge of ions) [21]. For example, partial amorphization of CNTs at 25 keV He + and Ne + ions irradiation was observed by Eswara et al [22].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation

Jarząbek¹,

Harvey²,

Levintant-Zayonts³

et al. 2020

Nanotechnology

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In this work we apply N+ ion irradiation on vertically aligned carbon nanotube (VACNT) arrays in order to increase the number of connections and joints in the CNT network. The ions energy was 50 keV and fluence 5 × 1017 ions cm−2. The film was 160 μm thick. SEM images revealed the ion irradiation altered the carbon bonding and created a sponge-like, brittle structure at the surface of the film, with the ion irradiation damage region extending ∼4 μm in depth. TEM images showed the brittle structure consists of amorphous carbon forming between nanotubes. The significant enhancement of mechanical properties of the irradiated sample studied by the cyclic nanoindentation with a flat punch indenter was observed. Irradiation on the VACNT film made the structure stiffer, resulted in a higher percentage recovery, and reduced the energy dissipation under compression. The results are encouraging for further studies which will lead to create a class of materials—ion-irradiated VACNT films—which after further research may find application in storage or harvesting energy at the micro/nanoscale.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation

Jarząbek¹,

Harvey²,

Levintant-Zayonts³

et al. 2020

Nanotechnology

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“…В данной работе анализ степени разупорядочения был проведен с помощью комбинационного рассеяния света. Спектроскопия комбинационного рассеяния является одним из основных методов исследования структурных особенностей материалов, позволяющих исследовать дефекты и степень аморфизации структуры [39][40][41]. Спектры комбинационного рассеяния (КР) были получены при комнатной температуре на установке "…”

Section: экспериментальные методыunclassified

Особенности Дефектообразования В Наноструктурированном Кремнии При Ионном Облучении

Кожемяко¹,

Евсеев²,

Балакшин³

et al. 2019

Физика И Техника Полупроводников

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Irradiations of the nanostructured silicon with Si+ and He+ ions were carried out with energies of 200 and 150 keV, respectively. Raman scattering showed destruction of the structure after irradiations and accumulation of defects at different fluences of irradiation. It is shown that monocrystalline silicon films are amorphized under irradiation at 0.7 displacement per atom. However, porous silicon does not completely amorphize at 0.5 displacement per atom, a weak signal is observed in the Raman spectra corresponding to the amorphous silicon phase, and at the same time there is an obvious signal from the crystalline phase of silicon. The size of nanocrystallites in the structure of porous silicon was estimated at different fluences of irradiation.

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“…Simulation was accompanied by experiments [12]. The mechanisms of sputtering the surface of multi-walled carbon nanotubes under ion irradiation are discussed in [4,10]. At the same time, the competition of two processes, thermal and ionic sputtering, is discussed.…”

Section: Introductionmentioning

confidence: 99%

LAMMPS Code Simulation of the Defect Formation Induced by Ion Incidence in Carbon Nanotubes

Shemukhin

Nazarov

Степанов

2019

JSFI

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A molecular dynamic calculation of the multi-walled carbon nanotube thermal sputtering induced by ion irradiation is carried out. Sputtering results comparable to experimental data are obtained. There are two models of ion and thermal sputtering discussed in the paper. The simulation tested the model of thermal amorphization and revealed that the disordering of multi-walled carbon nanotubes structure occurs as a result of their heating under ion irradiation. Classical molecular dynamic simulation was performed using LAMMPS code. Simulation cell with 14 layers multi-walled carbon nanotube 12 × 12 × 30 nm size contains 285600 atoms. Multi-walled carbon nanotube was irradiated by 80 keV energy Ar + ions in cumulative mode. Simulation was performed on the Lomonosov-1 supercomputer. About 24600 nodes-hours were spent on one simulation as a whole. The balancing of MPI flows for a spatial grid of counting nodes occurred according to the scheme 8 × 8 × 128 MPI-stream. LAMMPS code was built with Intel 12.0 compiler. This configuration allowed to speed up the calculation in comparison with the calculation on a single-processor Xeon CPU X5570 2.93 GHz machine by 60 times.

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Evolution of the multi-walled carbon nanotubes structure with increasing fluence of He ion irradiation

Cited by 25 publications

References 35 publications

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation

Особенности Дефектообразования В Наноструктурированном Кремнии При Ионном Облучении

LAMMPS Code Simulation of the Defect Formation Induced by Ion Incidence in Carbon Nanotubes

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Evolution of the multi-walled carbon nanotubes structure with increasing fluence of He ion irradiation

Cited by 25 publications

References 35 publications

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N+ ion irradiation

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N+ ion irradiation

Особенности Дефектообразования В Наноструктурированном Кремнии При Ионном Облучении

LAMMPS Code Simulation of the Defect Formation Induced by Ion Incidence in Carbon Nanotubes

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Product

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Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation

Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N⁺ ion irradiation