Research Articles (Physics): Recent submissions

Now showing items 421-440 of 719

The effects of high-energy proton irradiation on the electrical characteristics of Au/Ni/4H-SiC Schottky barrier diodes

Omotoso, Ezekiel; Meyer, Walter Ernst; Janse van Rensburg, Pieter Johan; Igumbor, Emmanuel; Tunhuma, Shandirai Malven; Ngoepe, Phuti Ngako Mahloka; Danga, Helga Tariro; Auret, Francois Danie (Elsevier, 2017-10)

Please read abstract in the article.
Rare earth interstitial-complexes in Ge : hybrid density functional studies

Igumbor, Emmanuel; Omotoso, Ezekiel; Danga, Helga Tariro; Tunhuma, Shandirai Malven; Meyer, Walter Ernst (Elsevier, 2017-10)

Please read abstract in the article.
Synthesis of ternary NiCo-MnO2 nanocomposite and its application as a novel high energy supercapattery device

Oyedotun, Kabir Oyeniran; Madito, M.J. (Moshawe); Momodu, Damilola Y.; Mirghni, Abdulmajid Abdallah; Masikhwa, T.M. (Tshifhiwa); Manyala, Ncholu I. (Elsevier, 2018-03)

Please read abstract in the article.
Structural modification of indium implanted glassy carbon by thermal annealing and SHI irradiation

Njoroge, Eric Gitau; Sebitla, L.D.; Theron, C.C. (Chris); Mlambo, Mbuso; Hlatshwayo, Thulani Thokozani; Odutemowo, Opeyemi Shakirah; Skuratov, V.A.; Wendler, E.; Malherbe, Johan B. (Elsevier, 2017-10)

Please read abstract in the article.
Investigation of different aqueous electrolytes on the electrochemical performance of activated carbon-based supercapacitors

Barzegar, Farshad; Momodu, Damilola Y.; Fashedemi, Omobosede O.; Bello, Abdulhakeem; Dangbegnon, Julien K.; Manyala, Ncholu I. (Royal Society of Chemistry, 2015-12)

In this study, porous activated carbons (AC) were synthesized by an environmentally friendly technique involving chemical activation and carbonization, with an in-depth experimental study carried out to understand the ...
Comparison of nickel, cobalt, palladium, and tungsten Schottky contacts on n-4H-silicon carbide

Gora, V.E.; Chawanda, A.; Nyamhere, C.; Auret, Francois Danie; Mazunga, F.; Jaure, T.; Chibaya, B.; Omotoso, Ezekiel; Danga, Helga Tariro; Tunhuma, Shandirai Malven (Elsevier, 2018-04)

We have investigated the current-voltage (I-V) characteristics of nickel (Ni), cobalt (Co), tungsten (W) and palladium (Pd) Schottky contacts on n-type 4H-SiC in the 300–800 K temperature range. Results extracted from I-V ...
Li states on a C–H vacancy in graphane : a first-principles study

Mapasha, Refilwe Edwin; Molepo, M.P.; Chetty, Nithaya (Royal Society of Chemistry, 2017)

Using a hybrid density functional theory approach, we have studied the effect of the interaction of a Li atom with a C–H pair vacancy defect (VCH) in a graphane monolayer on the thermodynamic stability, structural, magnetic ...
Thermoelectric effects in spin valves based on layered magnetic structures

Kunert, Herbert W.; Barnas, J. (Polish Academy of Sciences, 2017)

General aspects of thermoelectric effects in spin valves consisting of two magnetic layers separated by a nonmagnetic spacing layer are considered, with the main focus on the spin Seebeck effects. The Seebeck and spin Seebeck ...
Improved efficiency of organic solar cells using Au NPs incorporated into PEDOT:PSS buffer layer

Otieno, Francis; Shumbula, Ndivhuwo P.; Airo, Mildred; Mbuso, Mlambo; Moloto, Nosipho; Erasmus, Rudolph M.; Quandt, Alexander; Wamwangi, Daniel (American Institute of Physics, 2017-08-04)

Au based plasmonic phenomenon inside the hole transport layer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) of an organic solar cell based on blend of poly(3-hexylthiophene) (P3HT) and [6:6]-phenyl- ...
Enhanced electrochemical response of activated carbon nanostructures from tree-bark biomass waste in polymer-gel active electrolytes

Momodu, Damilola Y.; Bello, Abdulhakeem; Oyedotun, Kabir Oyeniran; Ochai-Ejeh, F.O. (Faith); Dangbegnon, Julien K.; Madito, M.J. (Moshawe); Manyala, Ncholu I. (Royal Society of Chemistry, 2017-07-26)

Activated carbon (ACB) obtained from tree bark waste biomass was obtained by adopting an optimized activation and carbonization route using potassium hydroxide (KOH) pellets. The morphological and structural characteristics ...
Influence of ammonia concentration on the microstructure, electrical and Raman properties of low temperature chemical bath deposited ZnO nanorods

Mwankemwa, Benard S.; Nambala, Fred Joe; Kyeyune, Farooq; latshwayo, Thulani Thokozani; Nel, Jacqueline Margot; Diale, M. (Mmantsae Moche) (Elsevier, 2017-11)

Nanostructured zinc oxide synthesized using an easy and low temperature chemical bath deposition method are among the most promising low cost semiconducting nanostructures investigated for a variety of applications. We ...
First-principles studies of chromium line-ordered alloys in a molybdenum disulfide monolayer

Andriambelaza, Noeliarinala Felana; Mapasha, Refilwe Edwin; Chetty, Nithaya (IOP Publishing, 2017-08)

Density functional theory calculations have been performed to study the thermodynamic stability, structural and electronic properties of various chromium (Cr) line-ordered alloy configurations in a molybdenum disulfide ...
Tartrazine removal from water using functionalized multiwall carbon nanotubes

Nait-Merzoug, A.; Guellati, O.; Benjaballah, A.; Janowska, I.; Begin, D.; Manyala, Ncholu I.; Guerioune, M. (Desalination Publications, 2017-03)

This investigation presents the advantages and limitations of tartrazine azo dye sorption on oxygen functionalized multiwalled carbon nanotubes (O-MWCNTs) synthesized by catalytic-CVD technique in LEREC laboratory, Algeria. ...
The role of energy losses in photosynthetic light harvesting

Kruger, T.P.J. (Tjaart); Van Grondelle, R. (IOP Publishing, 2017-07)

Photosynthesis operates at the bottom of the food chain to convert the energy of light into carbohydrates at a remarkable global rate of about 130 TW. Nonetheless, the overall photosynthetic process has a conversion ...
Migration behaviour of Europium implanted into single crystalline 6H-SiC

Mohlala, T.M.; Hlatshwayo, Thulani Thokozani; Mlambo, Mbuso; Njoroge, Eric Gitau; Motloung, Setumo Victor; Malherbe, Johan B. (Elsevier, 2017-07)

Migration behaviour of Europium (Eu) implanted into 6H-SiC was investigated using Rutherford backscattering spectroscopy (RBS), RBS in a channelling mode (RBS-C) and scanning electron microscopy (SEM). Eu ions of 360 keV ...
Visualising higher order Brillouin zones with applications

Andrew, Richard Charles; Salagaram, Trisha; Chetty, Nithaya (Institute of Physics, 2017-02-28)

A key concept in material science is the relationship between the Bravais lattice, the reciprocal lattice and the resulting Brillouin zones (BZ). These zones are often complicated shapes that are hard to construct and ...
Electrical characterization of defects induced by electron beam exposure in low doped n-GaAs

Tunhuma, Shandirai Malven; Auret, Francois Danie; Nel, Jacqueline Margot; Omotoso, Ezekiel; Danga, Helga Tariro; Igumbor, Emmanuel; Diale, M. (Mmantsae Moche) (Elsevier, 2017-10)

We have used deep level transient spectroscopy (DLTS) and Laplace DLTS (L-DLTS) to characterize the electrically active point defects introduced in n-type gallium arsenide by electron beam exposure prior to Schottky ...
ВЗАИМОДЕЙСТВИЯ ИЗЛУЧЕНИЯ И ЧАСТИЦ С КОНДЕНСИРОВАННЫМ ВЕЩЕСТВОМ

Didenko, P.; Selyshchev, Pavel (G.V. Kurdyumov Institute for Metal Physics, 2016)

В работе теоретически получена временная зависимость скорости ползу- чести металла под облучением. Установлены условия существования рав- ных нулю минимумов скорости ползучести и времена их появления. Ис- следовано, как ...
High electrochemical performance of hierarchical porous activated carbon derived from lightweight cork (Quercus suber)

Ochai-Ejeh, F.O. (Faith); Bello, Abdulhakeem; Dangbegnon, Julien K.; Khaleed, Abubakar A.; Madito, M.J. (Moshawe); Bazegar, Farshad; Manyala, Ncholu I. (Springer, 2017-09)

Activated carbon (AC) derived from biomass lightweight cork (Quercus suber) material was synthesized by KOH activation with different mass ratios of Q. suber: KOH in order to investigate the electrochemical properties of ...
Raman spectroscopy and imaging of Bernal-stacked bilayer graphene synthesized on copper foil by chemical vapour deposition : growth dependence on temperature

Fabiane, Mopeli; Madito, M.J. (Moshawe); Bello, Abdulhakeem; Manyala, Ncholu I. (Wiley, 2017-05)

We report on the effect of temperature on the growth of bilayer graphene on a copper foil under atmospheric pressure chemical vapour deposition (AP-CVD). Before characterization of the AP-CVD bilayer graphene, a high-quality ...

Now showing items 421-440 of 719

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