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Browsing Research Articles (Physics) by Title

Now showing items 281-300 of 625

H I in and behind the Hubble Frontier Field clusters : a deep MeerKAT pilot search out to z similar to 0.5

Ranchod, Shilpa; Deane, Roger; Obreschkow, Danail; Blecher, Tariq; Heywood, Ian (Oxford University Press, 2022-02)

Please read abstract in the article.
Half-metallic ferromagnetism in substitutionally doped boronitrene

Ukpong, Aniekan M.; Chetty, Nithaya (American Physical Society, 2012-11)

We perform first principles molecular dynamics simulations to investigate the magnetoelectronic response of substitutionally-doped boronitrene to thermal excitation. We show that the local geometry, size and edge-termination ...
Heat treatment of glassy carbon implanted with cesium at room and high temperatures

Langa, Dolly Frans; Van der Berg, Nic (Nicolaas George); Friedland, Erich Karl Helmuth; Malherbe, Johan B.; Botha, A.J.; Chakraborty, P.; Wendler, E.; Wesch, W. (Elsevier, 2012-02-15)

The effect of annealing temperature on the surface morphology and on the diffusion of cesium ions implanted into glassy carbon (Sigradur® G) is reported. The samples were implanted with 360 keV cesium ions to a fluence of ...
Helium and strontium co-implantation into SiC at room temperature and isochronal annealing : structural evolution of SiC and migration behaviour of strontium

Mokgadi, Thapelo Freddy; Abdalla, Zaki Adam Yousif; Abdelbagi, Hesham Abdelbagi Ali; Msimanga, Mandla; Maepa, Charity E.; Skuratov, Vladimir; Hlatshwayo, Thulani Thokozani (Elsevier, 2023-01)

Understanding the structural evolution of SiC implanted with fission product surrogates in the presence of helium (He) is of importance for its application in both fission and fusion rectors. In this study, polycrystalline ...
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 ...
High electrochemical performance of hybrid cobalt oxyhydroxide/nickel foam graphene

Masikhwa, T.M. (Tshifhiwa); Madito, M.J. (Moshawe); Momodu, Damilola Y.; Bello, Abdulhakeem; Dangbegnon, Julien K.; Manyala, Ncholu I. (Elsevier, 2016-12)

In this study, we report the in-situ hydrothermal synthesis of mesoporous nanosheets of cobalt oxyhydroxide (CoOOH) on nickel foam graphene (Ni-FG) substrate, obtained via atmospheric pressure chemical vapour deposition ...
High energy and excellent stability asymmetric supercapacitor derived from sulphur-reduced graphene oxide/manganese dioxide composite and activated carbon from peanut shell

Tarimo, Delvina Japhet; Oyedotun, Kabir Oyeniran; Mirghni, Abdulmajid Abdallah; Sylla, Ndeye Fatou; Manyala, Ncholu I. (Elsevier, 2020-09)

Please read abstract in the article.
A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode

Mirghni, Abdulmajid Abdallah; Madito, M.J. (Moshawe); Oyedotun, Kabir Oyeniran; Masikhwa, T.M. (Tshifhiwa); Ndiaye, Ndeye Maty; Ray, Sekhar. J.; Manyala, Ncholu I. (Royal Society of Chemistry, 2018)

This work presents the effect of different contents of graphene foam (GF) on the electrochemical capacitance of nickel phosphate Ni3(PO4)2 nano-rods as an electrode material for hybrid electrochemical energy storage ...
High performance asymmetric supercapacitor based on CoAl-LDH/GF and activated carbon from expanded graphite

Masikhwa, T.M. (Tshifhiwa); Madito, M.J. (Moshawe); Momodu, Damilola Y.; Dangbegnon, Julien K.; Guellati, Ouanassa; Harat, Aicha; Guerioune, Mohamed; Barzegar, Farshad; Manyala, Ncholu I. (Royal Society of Chemistry, 2016-05)

An asymmetric supercapacitor fabricated with CoAl-layered double hydroxide/graphene foam (LDH/GF) composite as the positive electrode and activated carbon derived from expanded graphite (AEG) as negative electrode in ...
High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Ochai-Ejeh, F.O. (Faith); Madito, M.J. (Moshawe); Madito, M.J. (Moshawe); Khaleed, Abubakar A.; Olaniyan, Okikiola; Manyala, Ncholu I. (Elsevier, 2017-10)

Thin Co-Mn layered double hydroxide (LDH) nanoflakes and Activated carbon (AC) from cork raw material (Quercus Suber) with highly porous structure and good textural properties was synthesized by a facile solvothermal and ...
High specific energy asymmetric supercapacitor based on alpha-manganese dioxide/activated expanded graphite composite and activated carbon-polyvinyl alcohol

Murovhi, Phathutshedzo; Tarimo, Delvina Japhet; Oyedotun, Kabir Oyeniran; Manyala, Ncholu I. (Elsevier, 2020-12)

Please read abstract in the article.
High-performance asymmetric supercapacitor based on vanadium dioxide and carbonized iron-polyaniline electrodes

Ndiaye, Ndeye Maty; Madito, M.J. (Moshawe); Ngom, B.D.; Masikhwa, T.M. (Tshifhiwa); Mirghni, Abdulmajid Abdallah; Manyala, Ncholu I. (American Institute of Physics, 2019-05-10)

Vanadium dioxide (VO2) monoclinic nanosheets were synthesized by a solvothermal method and carbonized iron-polyaniline (C-FP) nanograins were prepared by pyrolysis of iron-polyaniline (PANI) mixture under nitrogen ambient. ...
High-performance asymmetric supercapacitor based on vanadium dioxide/activated expanded graphite composite and carbon-vanadium oxynitride nanostructures

Ndiaye, Ndeye Maty; Sylla, Ndeye Fatou; Ngom, Balla Diop; Barzegar, Farshad; Momodu, Damilola Y.; Manyala, Ncholu I. (Elsevier, 2019-09)

Please read abstract in the article.
High-performance bimetallic Ni-Mn phosphate hybridized with 3-D graphene foam for novel hybrid supercapacitors

Mirghni, Abdulmajid Abdallah; Oyedotun, Kabir Oyeniran; Fasakin, Oladepo; Mahmoud, Badr Ahmed Mohammed; Tarimo, Delvina Japhet; Manyala, Ncholu I. (Elsevier, 2020-10)

Please read abstract in the article.
High-performance symmetric supercapacitor device based on carbonized iron-polyaniline/nickel graphene foam

Rantho, Mologadi Nkiyasi; Madito, M.J. (Moshawe); Manyala, Ncholu I. (Elsevier, 2020-04)

Please read abstract in the article.
High-resolution DLTS of vacancy–donor pairs in P-, As- and Sb-doped silicon

Auret, Francois Danie; Peaker, A.R.; Markevich, V.P.; Dobaczewski, L.; Gwilliam, R.M. (Elsevier, 2006-04)

We report results from an experiment designed to characterize, by high-resolution (Laplace) DLTS, the electronic properties of electron radiation induced E-centers in Si associated with P, Sb and As. Four sets of samples ...
High-resolution radio observations of five optically selected type 2 quasars

Krezinger, Mate; Frey, Sandor; Paragi, Zsolt; Deane, Roger (MDPI Publishing, 2020-04)

Many low-luminosity active galactic nuclei (AGNs) contain a compact radio core which can be observed with high angular resolution using very long baseline interferometry (VLBI). Combining arcsec-scale structural information ...
How glyphosate will survive changes in herbicide use

Reinhardt, Carl Frederick (Charlie) (Plaas Media, 2019-12)

Most commercial crop producers the world over will likely agree that glyphosate deserves to be hailed a once-ina-century herbicide. In stark contrast, many politicians and activists who lobby against genetically ...
How reduced excitonic coupling enhances light harvesting in the main photosynthetic antennae of diatoms

Kruger, T.P.J. (Tjaart); Malý, Pavel; Alexandre, Maxime T.A.; Mančal, Tomáš; Büchel, Claudia; Van Grondelle, Rienk (National Academy of Sciences, 2017-12)

Strong excitonic interactions are a key design strategy in photosynthetic light harvesting, expanding the spectral cross-section for light absorption and creating considerably faster and more robust excitation energy ...
Hybrid electrochemical supercapacitor based on birnessite-type MnO2/carbon composite as the positive electrode and carbonized iron-polyaniline/nickel graphene foam as a negative electrode

Rantho, Mologadi Nkiyasi; Madito, M.J. (Moshawe); Oyedotun, Kabir Oyeniran; Tarimo, Delvina Japhet; Manyala, Ncholu I. (American Institute of Physics, 2020-06)

In this work, a birnessite-type MnO2/carbon composite with hierarchical nanostructures was synthesized using KMnO4 solution and spent printing carbon grains. A hybrid electrochemical supercapacitor device was fabricated ...

Now showing items 281-300 of 625

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