University of Cape Coast Institutional Repository

Browsing COLLEGE OF AGRICULTURAL & NATURAL SCIENCES by Author "Mensah, S. Y."

Browsing COLLEGE OF AGRICULTURAL & NATURAL SCIENCES by Author "Mensah, S. Y."

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  • Magnetoplasmon excitations at graphene ortex hall fluid edge 
    Rabiu, M.; Mensah, S. Y.; Seini, I. Y.; Abukari, S. S. (University of Cape Coast, 2015)
    We investigate magnetoplasmon dynamics localized on the edges of graphene ortex Hall fluid. The ortex matter captures an anomalous term that causes ortex localization near fluid boundary and creates a double boundary ...
  • Negative high-harmonic differential conductivity in graphene nanoribbons 
    Rabiu, M.; Mensah, S. Y.; Abukari, S. S. (University of Cape Coast, 2012)
    We theoretically study current dynamics of graphene nanoribbons subject to bias and ac driven fields. We showed that graphene nanoribbons exhibit negative high-harmonic differential conductivity. Negative differential ...
  • Nonlinear conductivity in graphene 
    Abukaria, S. S.; Mensah, S. Y.; Musah, R.; Mensah, N. G.; Dompreh, K. A. (University of Cape Coast, 2015)
    We consider the tight-binding approximation for the description of energy bands of graphene, together with the standard Boltzmanns transport equation and constant relaxation time, an expression for the conductivity was ...
  • On the amplification of acoustic phonons in carbon nanotube 
    Dompreh, K. A.; Mensah, N. G.; Sakyi-Arthur, D.; Mensah, S. Y. (University of Cape Coast, 2016)
    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., [1] in ...
  • Prediction of organ and effective dose with known mas and kvp for dose optimisation protocol and recommendations in CT 
    Issahaku, Shirazu; Mensah, Y. B.; Schandorf, Cyril; Mensah, S. Y.; Sackey, Theophilus; Dery, Theresa Bebaaku; Pokoo-Aikins, Mark; Eduful, Ernest Kojo (University of Cape Coast, 2017)
    In medical exposure dose to patients are determine by input parameters including mAs, kVp, pitch factor among other factors. The aim of this study is to provide procedure and protocol of how to assess patients’ dose (organ ...
  • Semiconductor fluorinated carbon nanotube as a low voltage current amplifier acoustic device 
    Sakyi-Arthur, D.; Mensah, S. Y.; Adu, K. W.; Dompreh, K. A.; Edziah, R.; Mensah, N.; Jebuni-Adanu, C. (University of Cape Coast, 2020-02-12)
    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 q 1 , where q is the acoustic ...
  • Stability of gold thin films on polyimide 
    Amoako, G.; Mensah, S. Y.; Twum, A.; Teye, V. D. (University of Cape Coast, 2011)
    Gold/Polyimide interfaces are prepared by depositing thin gold films onto polyimide with Si substrates and subsequently annealing at various temperatures. The interface is studied with the help of Rutherford backscattering ...
  • Stark-cyclotron resonance in an array of carbon nanotubes 
    Abukaria, S. S.; Mensah, S. Y.; Musah, R.; Mensah, N. G.; Dompreh, K. A. (University of Cape Coast, 2015)
    Using the kinetic approach based on the semiclassical Boltzmanns transport equation with constant relaxation time, we theoretically studied the Stark cyclotron resonance in an array of carbon nanotubes. Exact expression ...
  • Thermoelectric amplification of phonons in graphene 
    Dompreh, K. A.; Mensah, N. G.; Mensah, S. Y.; Fosuhene, S. K. (University of Cape Coast, 2016-07-07)
    Amplification of acoustic in-plane phonons due to an external temperature gradient (rT) in single-layer graphene (SLG) was studied theoretically. The threshold temperature gradient ðrTÞ g 0 and the threshold voltage ðVTÞ ...

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