Semiconductor Fluorinated Carbon Nanotube as a Low Voltage Current Amplifier Acoustic Device

Sakyi-Arthur, D.; Mensah, S. Y.; Adu, Kofi W.; Dompreh, K. A.; Edziah, R.; Mensah, N. G.; Jebuni-Adanu, Cynthia

doi:10.4236/wjcmp.2020.101002

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…current in the material, known as acoustoelectric effect ( ) [4][5][6]. Theoretical and experimental studies of the generation of in low dimensional structures such as graphene [7][8][9][10], quantum wells ( ) [11] and carbon nanotubes [12][13][14][28][29][30] as well as superlattices ( ) [4,15] have generated lots of interest recently due to the variety of applications that can be derived from these novel nanostructures. Much of the theoretical investigations are mostly pursued using microscopic theory of electron-phonon interactions employing semi-classical Boltzmann's transport equation in the hypersound regime [4,5].…”

Section: Landau Damping Of Plasma Waves (mentioning

confidence: 99%

Acoustoelectric Current in Graphene Nanoribbon due to Landau Damping

Dompreh

Adu

Sakyi-Arthur

et al. 2021

Preprint

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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 acoustic phonons (LDOAP) in graphene nanoribbon that leads to acoustoelectric current generation. Under a non-quantized field with drift velocity, we observed an acoustic phonon energy quantization which depends on the energy gap, the width and the sub-index of the material. An effect similar to Cerenkov emission was observed where the electron absorbs the confined acoustic phonons energy, causing the generation of acoustoelectric current in Graphene Nanoribbon. A qualitative analysis of the absorption and versus phonon frequency is in agreement with experimental reports. We observed a shift in the peaks when the energy gap and the drift velocity were varied. Most importantly, a transparency window appears when making graphene nanoribbon a potential candidate as an acoustic wave filter with applications in phonon spectrometers and also as tunable gate-controlled quantum information device.

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Section: Landau Damping Of Plasma Waves (mentioning

confidence: 99%

Acoustoelectric Current in Graphene Nanoribbon due to Landau Damping

Dompreh

Adu

Sakyi-Arthur

et al. 2021

Preprint

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“…where µ is the electrochemical potential which ensures carrier conservation. For a p−type FSWCNT with a periodicity of 3b, the energy band is given as [8,[21][22][23][24][25]:…”

Section: Carrier Current Densitiesmentioning

confidence: 99%

“…SWCNTs skeletal structure enables the attachment of large number of foreign atoms to the surface without destroying the tubular structure. Doping an armchair-SWCNT with fluorine atoms changes its nature from metallic to semiconducting [8,[21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Giant Thermoelectric Figure of Merit in Fluorine Doped Single Walled Carbon Nanotube

Adu¹,

Sakyi-Arthur²,

Mensah³

et al. 2021

Preprint

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Herein, we report on a giant thermoelectric figure of merit 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 the influence of the doping concentration, and the overlapping integrals on the ZT. The ZT and the temperature range of operation can be tuned using the doping (impurity) concentration and the overlapping integrals, respectively. The lattice thermal conductivity obtained using the phonon LBM was calculated to be 107.2 W/mK which yielded a ZT greater than 20. Interestingly, the ZT obtained is higher than what has been reported in superlattices, (ZT~1.4) and superlattice nanowire, (ZT~ 4) at 300 K, making FSWCNT a potential candidate for thermoelectric applications.

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