Electrical and elastic properties of an array of carbon nanotubes after irradiation by high-energy electrons

Anikeev, V. V.; Koval'chuk, B. V.; Lazorenko, V.M.; Mikhailova, G. Yu.; Нищенко, М. М.; Пименов, В. Н.; Sidorchenko, I. M.; Suskaya, Yu. F.; Tovtin, V. I.

doi:10.1134/s2075113314020051

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Obviously, ε decreases more sharply for samples irradiated at a smaller dose, from 80 to 46% for the unannealed samples and from 82 to 40% for the annealed samples. This plot also contains the dependences of the maximum elasticity on the irradiation dose at electron energy E = 21 MeV [17]. Similar behavior is observed for CNTs subjected to γ irradiation with E = 1.2 MeV; the difference is that the minimum is deeper and is at lower doses [14].…”

Section: Resultsmentioning

confidence: 62%

“…Multiwall CNTs with a diameter of 18 ± 7 nm were produced via chemical vapor deposition (CVD) and identified via transmission electron microscopy (TEM) on a JEM 100CX11 setup (Japan) [17]. The irra diation was conducted in an U 10 linear electron accel erator with an energy of 2 MeV at a current of 200 μA and doses of 0.63 × 10 17 and 1.9 × 10 17 el/cm 2 .…”

Section: Methodsmentioning

confidence: 99%

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Effect of electron irradiation on the formation and healing of defects in carbon nanotubes

Anikeyev¹,

Koval'chuk²,

Lazorenko

et al. 2016

Inorg. Mater. Appl. Res.

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The effect of electron irradiation with E = 2 MeV and a dose of 1.9 × 10 17 el/cm 2 of annealed and pristine carbon nanotubes (CNTs) on the electrical conductivity σ(ρ), thermoelectric emf (α), and elastic characteristics during deformation and relaxation during unloading is studied. The annealing of CNTs at 800°C removes the topological defects (the Stone-Wales ones, vacancies, and adatoms) which distort the CNT shape. As is found, after electron irradiation with small doses (0.63 × 10 17 el/cm 2 ), the defects accumu late, while at high doses (1.9 × 10 17 el/cm 2 ) they are healed. The growth and radiation defects lead separately to a topological disorder, reducing the σ(ρ) parameter and increasing α. However, upon irradiation and dur ing the interaction between the defects of different genesis, their healing becomes more effective in compar ison with annealing, and the mechanism of effective healing can be associated with the small CNT sizes, rapid migration of the sputtered atoms between the graphene layers, and their recombination with vacancies.

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Section: Resultsmentioning

confidence: 62%

Section: Methodsmentioning

confidence: 99%

Effect of electron irradiation on the formation and healing of defects in carbon nanotubes

Anikeyev¹,

Koval'chuk²,

Lazorenko

et al. 2016

Inorg. Mater. Appl. Res.

Self Cite

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show abstract

“…On the other hand, a low concentration of electrons in the CNTs makes it possible to easily control the position of the Fermi level: to shift it deep into the valence band with a decrease in the conduction electron concentration or, conversely, into the conduction band, if the metal work function is lower than the work function of CNTs. Methodical point of our investigation [14,15] consists in the use of the CNTs/metal array (mechanical mixture of nanotubes and powder metal, which has the work function smaller than the work function of CNTs). As a result, the electrical conductivity of an array has reached higher values than the corresponding value of each of the components separately.…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of Electrical Conductivity of Metal/Carbon Nanotubes Array

Нищенко¹,

Mykhailova²,

Prikhod’ko³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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A study of the electrical conductivity of mechanical mixture of both the carbon nanotubes (CNTs) (with work function of 4.7 eV) and the Cu and Al metal microparticles (with lower work functions of 4.2 and 4.0 eV, respectively) under compression is provided. As shown, the electrical conductivity of the Al and Cu powders is essentially increased with addition of the CNTs (up to 30 wt.%). The electrical conductivity dependence on the density of a powder mixture of Al with CNTs is characterized by a deep minimum observed at the concentration of 9.6 wt.% CNTs. This feature is a result of the electrons' localization in the Al 2 O 3 film formed on a sample surface. A number of factors, in particular, a shift of the Fermi level of the CNTs deep into the valence band, explain the sharp decrease in the electrical conductivity of the Al CNTs composite, unlike the Cu-based composite.

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Thermoelectric and Elastic Properties of Carbon Nanotubes Irradiated with High-Energy Electrons

Mikhailova

Нищенко

Пименов

et al. 2019

Inorg. Mater. Appl. Res.

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Electrical and elastic properties of an array of carbon nanotubes after irradiation by high-energy electrons

Cited by 4 publications

References 5 publications

Effect of electron irradiation on the formation and healing of defects in carbon nanotubes

Effect of electron irradiation on the formation and healing of defects in carbon nanotubes

Peculiarities of Electrical Conductivity of Metal/Carbon Nanotubes Array

Thermoelectric and Elastic Properties of Carbon Nanotubes Irradiated with High-Energy Electrons

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