Features of electron reflection by layer of carbon nanotubes

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Abstract

The anisotropic properties of a layer of carbon nanotubes upon electron reflection have been studied. Only a small part of the incident electrons is found to reflect from a target with a surface layer of oriented carbon nanotubes. Reflection occurs only from a layer of horizontally oriented nanotubes at an angle of incidence greater than 80° and vertically oriented nanotubes at an angle of incidence less than 10°. The effect is explained by peculiarities of the formation of an electron flux in the surface layers of the target.

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About the authors

N. V. Novikov

Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Author for correspondence.
Email: nvnovikov65@mail.ru
Russian Federation, 119991, Moscow

N. G. Chechenin

Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Email: nvnovikov65@mail.ru
Russian Federation, 119991, Moscow

A. A. Shirokova

Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Email: nvnovikov65@mail.ru
Russian Federation, 119991, Moscow

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2. Fig. 1. Dependence of the reflection coefficient F(E,α = 0) on the angle of incidence when reflecting from a homogeneous carbon target of electrons with energy: 11 (1); 50 keV (2).

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3. Fig. 2. Variants of the arrangement of a cluster of NCNT = 91 single-layer CNTs with respect to a beam of electrons incident on the target at an angle α to the normal, which is oriented: a – along the axis of the tubes; b – perpendicular to the axis of the tubes at an angle between the scattering plane and the direction of the CNT φ = 0°.

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4. Fig. 3. Dependence on the azimuth angle of the reflection coefficient by a layer of horizontally oriented CNTs. Electrons with energy E = 20 keV fall to the surface at an angle α: 1 – 80°; 2 – 85°; 3 – 88°.

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5. Fig. 4. Dependence on the angle of incidence of the reflection coefficient from a target of horizontally oriented CNTs at φ = 0° of electrons with energy: 11 (1); 20 (2); 30 (3); 50 keV (4). The calculation errors correspond to the size of the symbols on curve 4.

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6. Fig. 5. Dependence of the reflection coefficient on the angle of incidence during electron scattering by a target of vertically oriented CNTs. Notation as in Fig. 4.

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