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E. C. Hemba

Publications (5)

Calculation of Cohesive Energies of 3-D Bismuth Selenide (Bi2Se3) and Bismuth Antimony BiSb Topological Insulators: DFT Study

E. C. Hemba, T. J. Ikyumbur, E. A. Trisma, F. Gbaorun & F. Aungwa · Asian Journal of Research and Reviews in Physics · 2022

The cohesive energies of 3-dimensional (3-D) topological insulators bismuth antimony (BiSb) and bismuth selenide (Bi2Se3) were calculated. The Fritz Haber Institute Ab-initio molecular simulations (FHI-aims) code was employed for this calculation.  The output files of the FHI-aim...

Open access Research Article 10.9734/ajr2p/2022/v6i4124

Mass Concentration and Size-distribution of Atmospheric Particulate Matter in Plateau State, Nigeria

E. C. Hemba, E. A. Trisma & T. J. Ikyumbur · International Journal of Environment and Climate Change · 2019

The mass concentration and size distribution of atmospheric particulate matter (PM) was measured in three major towns in Plateau state. The CW-HAT200 PM2.5, PM10 dust particle counter was used to measure the particle size in each major location within Jos, Shendam and Pankshin. T...

Open access Research Article 10.9734/ijecc/2019/v9i1230151

Dielectric Properties of 1-ethyl-3-methyl-imidazolium Tetrafluoroborate (EMIM-BF4) Using Cole-Cole Relaxation Model

T. J. Ikyumbur, E. N. Asagha, E. C. Hemba & J. A. Bash · Physical Science International Journal · 2017

The Cole-Cole relaxation equations were derived from the Debye equation. The dielectric constant E’ and loss factor E” of EMIM-BF4 were fitted using the derived equations at temperature range of 5°C to 65°C and frequency range of 0.1GHz to 10GHz. The result obtained shows that th...

Open access Research Article 10.9734/PSIJ/2017/31315

Optimization in the Computation of Dielectric Constant of Methanol Using Debye Relaxation Method

T. J. Ikyumbur, M. Y. Onimisi, S. G. Abdu, E. C. Hemba & Z. J. Kirji · Current Journal of Applied Science and Technology · 2017

The Debye relaxation equation and its derivatives were used to analyze dielectric constant and loss factor of pure methanol in megahertz and gigahertz over the temperature range of 10°C to 50°C. This was done in order to ascertain which of the frequency ranges has the highest die...

Open access Research Article 10.9734/BJAST/2017/31374

Frequency and Temperature Effect on Dielectric Properties of Acetone and Dimethylformamide

M. Y. Onimisi, J. T. Ikyumbur, S. G. Abdu & E. C. Hemba · Physical Science International Journal · 2016

The dielectric behavior of both acetone and dimethylformamide (DMF) were examined in the presence of an electric field. The electrical conductivity of both solvents was used to estimate the complex permittivity of acetone and dimethylformamide. The relaxation time of the solvents...

Open access Research Article 10.9734/PSIJ/2016/27742