N. G. Mensah
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View article: Giant thermoelectric figure of merit in fluorine-doped single walled-carbon nanotubes
Giant thermoelectric figure of merit in fluorine-doped single walled-carbon nanotubes Open
Herein, we report on a giant thermoelectric figure of merit (ZT) of a non-degenerate fluorine-doped single-walled carbon nanotube (FSWCNT) using a tractable analytical approach and the phonon lattice Boltzmann model (LBM). We investigate t…
View article: Acoustoelectric Current in Graphene Nanoribbon due to Landau Damping
Acoustoelectric Current in Graphene Nanoribbon due to Landau Damping Open
We perform self-consistent analysis of the Boltzmann transport equation for momentum and energy in the hypersound regime i.e., ql >> 1 ( q is the acoustic wavenumber and l is the mean free path). Here, we investigate Landau damping of acou…
View article: Temperature Dependent Resistivity of Chiral Single-Walled Carbon Nanotubes in the Presence of Coherent Light Source
Temperature Dependent Resistivity of Chiral Single-Walled Carbon Nanotubes in the Presence of Coherent Light Source Open
We have studied the axial resistivity of chiral single-walled carbon nanotubes (SWCNTs) in the presence of a combined direct current and high frequency alternating fields. We employed semiclassical Boltzmann equations approach and compared…
View article: Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field
Acoustoelectric Effect in Fluorinated Carbon Nanotube in the Absence of External Electric Field Open
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. , whe…
View article: Semiconductor Fluorinated Carbon Nanotube as a Low Voltage Current Amplifier Acoustic Device
Semiconductor Fluorinated Carbon Nanotube as a Low Voltage Current Amplifier Acoustic Device Open
Acoustoelectric effect (AE) in a non-degenerate fluorinated single walled carbon nanotube (FSWCNT) semiconductor was carried out using a tractable analytical approach in the hypersound regime , where q is the acoustic wavenumber and is the…
View article: Induced Hall-Like Current by Acoustic Phonons in Semiconductor Fluorinated Carbon Nanotube
Induced Hall-Like Current by Acoustic Phonons in Semiconductor Fluorinated Carbon Nanotube Open
We show that Hall-like current can be induced by acoustic phonons in a nondegenerate, semiconductor fluorine-doped single-walled carbon nanotube (FSWCNT) using a tractable analytical approach in the hypersound regime (q is the modulus of t…
View article: Influence of Subject Matter Knowledge on Students’ Elective Mathematics Performance in Senior High Schools in Ghana: Does Teaching Experience Matter?
Influence of Subject Matter Knowledge on Students’ Elective Mathematics Performance in Senior High Schools in Ghana: Does Teaching Experience Matter? Open
This study examined the moderating role of teaching experience in the relationship between subject matter knowledge (SMK) and students’ performance in elective mathematics in Senior High Schools (SHS) in Ghana. The study employed the posit…
View article: 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 Open
We studied theoretically the absorption of acoustic phonons in the hypersound regime in Fluorine modified carbon nanotube (F-CNT) \n\n\nΓ\nq\n\nF\n−\nCNT\n\n\n\n and compared it to that of undoped single walled carbon nanotube (SWCNT) \n\n…
View article: Behaviour of hot electrons under the dc field in chiral carbon nanotubes
Behaviour of hot electrons under the dc field in chiral carbon nanotubes Open
Behaviour of hot electrons under the influence of dc field in carbon nanotubes is theoretically considered. The study was done semi-classically by solving Boltzmann transport equation with the presence of the hot electrons source to derive…
View article: On the amplification of acoustic phonons in carbon nanotube
On the amplification of acoustic phonons in carbon nanotube Open
We present a theoretical study of acoustic phonons amplification in Carbon Nanotubes (CNT). The phenomenon is via Cerenkov emission (CE) of acoustic phonons using intraband transitions proposed by Mensah et. al.,~\cite{1} in Semiconductor …
View article: Influence of external temperature gradient on acoustoelectric current in graphene
Influence of external temperature gradient on acoustoelectric current in graphene Open
Recent analyses of thermoelectric amplification of acoustic phonons in Free-Standing Graphene (FSG) $Γ_q^{grap}$ have prompted the theoretical study of the influence of external temperature gradient ($\nabla T$) on the acoustoelectric curr…
View article: Hot electrons injection in carbon nanotubes under the influence of quasi-static ac-field
Hot electrons injection in carbon nanotubes under the influence of quasi-static ac-field Open
Hot electrons injection in carbon nanotubes (CNTs ) where in addition to\napplied dc field ($\\mathbf{E}$), there exist simultaneously a quasi-static ac\nelectric field (i.e. when the frequency $\\omega$ of ac field is much less than\nthe …
View article: Direct Current Generation in Carbon Nanotubes by Terahertz Field
Direct Current Generation in Carbon Nanotubes by Terahertz Field Open
We report on a theoretical investigation of a direct current generation in carbon nanotubes (CNTs) that are stimulated axially by terahertz (THz) field. We consider the kinetic approach based on the semiclassical Boltzmann’s transport equa…