Role of finite-size effects in the microwave and subterahertz electromagnetic response of a multiwall carbon-nanotube-based composite: Theory and interpretation of experiments

Шуба, М. В.; Melnikov, A. V.; Paddubskaya, A.; Kuzhir, P.; Maksimenko, S. A.; Thomsen, C.

doi:10.1103/physrevb.88.045436

Cited by 53 publications

(48 citation statements)

References 58 publications

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“…This result agrees with our previous theoretical predictions [7]. Indeed, as it has been shown earlier, the electromagnetic properties of composites are mostly determined by the polarizability α of the individual inclusions.…”

Section: Resultssupporting

confidence: 93%

“…The frequency position f p of this peak depends on both length and diameter of CNTs. As demonstrated in [7], the frequency f p splits the spectra into two different parts: quasistatic and dynamic regimes. In the quasi-static regime (f ≤ f p ), the CNT polarizability is strongly influenced by the finite-length effect, leading to a strong screening as outermost shells screen the internal ones.…”

Section: Resultsmentioning

confidence: 99%

“…are considered to be the most promising for developing efficient electromagnetic shielding materials. As already shown in our previous research works [5][6][7][8], carbon nanotubes (CNTs) are among the best candidates for designing EM shielding polymer materials, owing to their high aspect ratio (~1000) and unique electronic properties. Shielding effectiveness (SE) of CNT-based composites depends on the type of polymer matrix and on the characteristics of CNTs such as length [9], diameter [5,10], and orientation [11].…”

Section: Introductionmentioning

confidence: 90%

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Shielding effects in thin films of carbon nanotubes within microwave range

et al. 2016

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The electromagnetic shielding properties of thin films comprising different types of carbon nanotubes (CNTs) were analysed in the microwave frequency range (26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36). A comparative analysis of the shielding properties was achieved for films based on long and short single-, double-and multi-walled CNTs. The experimental results proved that long-length single-walled CNTs demonstrate the highest interaction with the electromagnetic (EM) field, thereby providing the best shielding efficiency. At the same time, double-walled CNTs demonstrate a higher level of absorption ability (50%) along with the overall high EM shielding efficiency (88%), which makes them attractive for using in nanoelectronics screens as they produce the smallest secondary EM pollution.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

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Shielding effects in thin films of carbon nanotubes within microwave range

et al. 2016

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“…In order to interpretation of the stable EMI SE of the macro-films at the wide frequency, finite-size (the length L and the diameter D of the CNTs) effect in electromagnetic response of the CNTs was applied. [24][25][26][27] According to finite-size theory, the axial surface conductivity of the p th shell (σ p ) is considered to be the conductivity of CNTs:…”

Section: Resultsmentioning

confidence: 99%

“…Calculation of Shuba also showed the EMI SE is larger for longer and thinner CNTs. 27 The double-walled CNTs in the composite were entangled and became bundles. Therefore, the length is much longer and diameter is much smaller than that of multi-walled CNTs.…”

Section: Resultsmentioning

confidence: 99%

Electromagnetic interference shielding effectiveness of composite carbon nanotube macro-film at a high frequency range of 40 GHz to 60 GHz

Cheng

Wen

et al. 2015

AIP Advances

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The electromagnetic interference (EMI) shielding effectiveness (SE) of carbon nanotube (CNT) macro-film that is adhered to common cloth to maintain the light weight, silk-like quality, and smooth surface of the material for EMI shielding is investigated. The results show that a high and stable EMI SE of 48 dB to 57 dB at 40 GHz to 60 GHz was obtained by the macro-film with a thickness of only ∼4 μm. The composite CNT macro-film is easily manipulated, and its EMI property is significantly different from that of traditional electromagnetic shielding materials that show a lower EMI SE with increasing frequency. For example, the EMI SE of Cu foils decrease from 75 dB to 35 dB as frequency increases from 25 GHz to 60 GHz. Considering their stable and outstanding EMI SE and easy manipulation, the composite CNT macro-films are expected to have potential applications in shielding against millimeter waves.

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Heat-resistant unfired phosphate ceramics with carbon nanotubes for electromagnetic application

Plyushch

Bychanok

Kuzhir

et al. 2014

Phys. Status Solidi A

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Composite materials, containing low concentrations of carbon nanotubes (CNTs) of three different diameters and heat‐resistant phosphate ceramic as a matrix were prepared by cold‐pressing method. Their dielectric properties were studied at room temperature in a wide frequency range (20 Hz–1 MHz). It was found experimentally and proved theoretically via modeling of the composites as a random capacitor–resistor–diode network that electrical percolation concentration depends significantly on the diameter of the nanoinclusions. The main conclusion is that the best candidate providing both the lower percolation threshold and high absolute values of ac conductivity is thinner carbon nanotubes (in our particular case, 8–15 nm).

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Role of finite-size effects in the microwave and subterahertz electromagnetic response of a multiwall carbon-nanotube-based composite: Theory and interpretation of experiments

Cited by 53 publications

References 58 publications

Shielding effects in thin films of carbon nanotubes within microwave range

Shielding effects in thin films of carbon nanotubes within microwave range

Electromagnetic interference shielding effectiveness of composite carbon nanotube macro-film at a high frequency range of 40 GHz to 60 GHz

Heat-resistant unfired phosphate ceramics with carbon nanotubes for electromagnetic application

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