Nonlinear current in modified nanotubes with exposure to alternating and constant electric fields

Sadykov, N. R.; Kocherga, E. Yu.; D’yachkov, P. N.

doi:10.1134/s0036023613080202

Cited by 13 publications

(13 citation statements)

References 6 publications

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“…To aid a better understanding of the comparison between the absorption obtained in both SWNT and F-CNT, a semilog plot is presented in Figure 3 which clearly shows that the undoped SWNT absorbs more than the doped F-CNT. This can be attributed to the fact that the presence of F-CNT atoms leads to chemical activation of a passive surface CNT by adding additional electronic band structure and altering the carbon π-bonds around the Fermi level in a non-linear manner thus forming a band structure of width two periods [21].…”

Section: Resultsmentioning

confidence: 99%

“…Current researches have predicted sp 2 bonding charge change to sp 3 by F-functionlization [23,24,25]. This bonding charge change would reduce the density of free carriers, consequently leading to the magnitude reduction of the absorption [21].…”

Section: Resultsmentioning

confidence: 99%

“…m is the surface concentration of charge carriers and I o is the modified Bessel function. For a chemically modified F-CNT, where the Fluorine atoms form a one-dimensional chain, the energy dispersion can be deduced by using the Huckel matrix method where translational symmetry is accounted for as [21] ε = α π + Ξ n γ 0 cos 2n−1 (ap z )…”

Section: Theorymentioning

confidence: 99%

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Absorption of Acoustic Phonons in Fluorinated Carbon Nanotubes with Non-Parabolic, Double Periodic Band

Sekyi-Arthur¹,

Mensah²,

Mensah³

et al. 2018

Phonons in Low Dimensional Structures

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We studied theoretically the absorption of acoustic phonons in the hypersound regime in Fluorine modified Carbon Nanotube (F-CNT) Γ F −CN T q and compared it to that of undoped Single Walled Nanotube (SWNT) Γ SW N T q .Per the numerical analysis, the F-CNT showed less absorption to that of|. This is due to the fact that Fluorine is highly electronegative and weakens the walls of the SWNT. Thus, the πelectrons associated with to the Fluorine which causes less free charge carriers to interact with the phonons and hence changing the metallic properties of the SWNT to semiconductor by the doping process. From the graphs obtained, the ratio of hypersound absorption in SWNT to F-CNT at T = 45K isClearly, the ratio decreases as the temperature increases.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Absorption of Acoustic Phonons in Fluorinated Carbon Nanotubes with Non-Parabolic, Double Periodic Band

Sekyi-Arthur¹,

Mensah²,

Mensah³

et al. 2018

Phonons in Low Dimensional Structures

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“…Doping a metallic SWCNT with Fluorine and thus ensuring a double periodicity along the axial direction forms a FSWCNT as perceived by Sadykov et al [23], thus, changing the metallic property to semiconducting. The generation of AE current for contemporary applied sciences as against the use of conventional direct current has attracted lots of interest in heterogenous structured devices [24].…”

Section: Introductionmentioning

confidence: 99%

Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field

Sakyi-Arthur¹,

Mensah²,

Adu³

et al. 2020

WJCMP

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Acoustoelectric effect (AE) in a non-degenerate Fluorine modified single walled carbon nanotube (FSWCNT) semiconductor is studied theoretically using the Boltzmann's transport equation. The study is done in the hypersound regime i.e. 1 q  , where q is the acoustic phonon wavenumber and  is the electron mean free path. The results obtained are compared with that of undoped single walled carbon nanotube (SWCNT). The AE current density for FSWCNT is observed to be four orders of magnitude smaller than that of undoped SWCNT with increasing temperature, that is FSWCNT SWCNT z z j j . This is because the electron-phonon interactions in SWCNT are stronger than FSWCNT. Thus, there are more intra-mini-band electrons interacting with the acoustic phonons to generate a higher AE current in SWCNT than in FSWCNT. This has been observed experimentally, where the electrical resistance of FSWCNT is higher than pristine SWCNT i.e. 20 M R Ω . The study shows the potential for FSWCNT as an ultrasound current source density imaging (UCSDI) and AE hydrophone material. However, FSWCNT offers the potential for room temperature applications of acoustoelectric device but other techniques are needed to reduce the resistance.

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“…Accumulated experimental data [13][14][15][16][17] show that in many cases transient electrolysis allows one to achieve effects that either cannot be achieved using a direct current or can be achieved in a much more complicated fashion. The ability to affect an electrochemical process more efficiently and flexibly due to the change of a mode and frequency variation of amplitudes for both anodic and cathodic current pulses is an undeniable advantage for transient electrolysis.…”

Section: Introductionmentioning

confidence: 99%

The use of transient electrolysis in the technology of oxide composite nanostructured materials: review

Bespalova¹,

Храменкова²

2016

Nanosystems: Phys. Chem. Math.

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The available experimental material relating to the patterns of formation and properties of functional nanostructured transition metal oxide (Mo, Co, Mn, Ni, Fe, V) composite materials is reviewed. Advanced coatings are considered those whose formation method are simple and do not require high energy costs, expensive equipment and permit the creation of materials with desired physical and chemical properties in a specified manner. In this review, the priority of oxide composite nanostructured materials technology is given to a transient electrolysis method based on the analysis of a data set that demonstrates its advantages. The results are presented for a number of studies aimed at identifying and analyzing the nature and regularities of processes that take place when obtaining oxide composite nanostructured materials using transient electrolysis methods.

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Nonlinear current in modified nanotubes with exposure to alternating and constant electric fields

Cited by 13 publications

References 6 publications

Absorption of Acoustic Phonons in Fluorinated Carbon Nanotubes with Non-Parabolic, Double Periodic Band

Absorption of Acoustic Phonons in Fluorinated Carbon Nanotubes with Non-Parabolic, Double Periodic Band

Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field

The use of transient electrolysis in the technology of oxide composite nanostructured materials: review

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