Generation and repair of defect for carbon nanotube under tensile stress by low acceleration electron beam irradiation

Ueki, Ryuichi; Endo, Ryosuke; Hikata, Takeshi; Okubo, Soichro; Utsunomiya, Risa; Fujita, Jun–ichi

doi:10.1016/j.mee.2011.02.070

Cited by 2 publications

(2 citation statements)

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“…In early studies on electron-induced crystallisation, beam heating through continuous electron irradiation was believed to be the main reason for the modification of the atomic structure. To date, however, results of experiments 37 and simulations 32 have led to the rejection of beam heating as a possible mechanism. Our experimental EBI configuration for MoS 2 crystallisation and temperature measurement of the substrate, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Atomic rearrangement of a sputtered MoS2 film from amorphous to a 2D layered structure by electron beam irradiation

Kim

Yoon

2017

Sci Rep

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We synthesised a crystalline MoS2 film from as-sputtered amorphous film by applying an electron beam irradiation (EBI) process. A collimated electron beam (60 mm dia.) with an energy of 1 kV was irradiated for only 1 min to achieve crystallisation without an additional heating process. After the EBI process, we observed a two-dimensional layered structure of MoS2 about 4 nm thick and with a hexagonal atomic arrangement on the surface. A stoichiometric MoS2 film was confirmed to grow well on SiO2/Si substrates and include partial oxidation of Mo. In our experimental configuration, EBI on an atomically thin MoS2 layer stimulated the transformation from a thermodynamically unstable amorphous structure to a stable crystalline nature with a nanometer grain size. We employed a Monte Carlo simulation to calculate the penetration depth of electrons into the MoS2 film and investigated the atomic rearrangement of the amorphous MoS2 structure.

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Section: Resultsmentioning

confidence: 99%

Atomic rearrangement of a sputtered MoS2 film from amorphous to a 2D layered structure by electron beam irradiation

Kim

Yoon

2017

Sci Rep

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“…[3][4][5] In addition, charge transfer from an encapsulated metal to the outer surface strongly induces an electrical polarization in metal-encapsulated fullerene, which could turn out to be a key mechanism for molecular switching devices. 6,7 Thus, rational control of these carbon-cage structures [8][9][10][11][12][13] would be of great benefit for future electronic applications as well as for nanomechanical applications. 14,15 Fullerenes and carbon cages have previously been synthesized from a graphite source material at high temperatures of about 3000 K 16,17 under the non-equilibrium ambient of Arc-plasma.…”

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confidence: 99%

Beam-induced graphitic carbon cage transformation from sumanene aggregates

Fujita

Tachi

Murakami

et al. 2014

Applied Physics Letters

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We found that electron-beam irradiation of sumanene aggregates strongly enhanced their transformation into a graphitic carbon cage, having a diameter of about 20 nm. The threshold electron dose was about 32 mC/cm2 at 200 keV, but the transformation is still induced at 20 keV. The transformation sequence suggested that the cage was constructed accompanied by the dynamical movement of the transiently linked sumanene molecules in order to pile up inside the shell. Thus, bond excitation in the sumanene molecules rather than a knock-on of carbon atoms seems to be the main cause of the cage transformation.

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Generation and repair of defect for carbon nanotube under tensile stress by low acceleration electron beam irradiation

Cited by 2 publications

References 13 publications

Atomic rearrangement of a sputtered MoS2 film from amorphous to a 2D layered structure by electron beam irradiation

Atomic rearrangement of a sputtered MoS2 film from amorphous to a 2D layered structure by electron beam irradiation

Beam-induced graphitic carbon cage transformation from sumanene aggregates

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