Recently added

Research Articles (Physics): Recent submissions

  • Electrical and optical properties of mixed phase tungsten trioxide films grown by laser pyrolysis 
    Govender, Malcolm; Mwakikunga, B.W.; Machatine, Augusto Gonçalo Jose; Kunert, Herbert W. (Wiley, 2014-02)
    Laser pyrolysis is a synthesis method used to produce thin films and nanomaterials of high quality and purity, by intersecting a laser beam with a chemical precursor. We have chosen laser pyrolysis to synthesize ...
  • Singlet-triplet annihilation in single LHCII complexes 
    Gruber, J. Michael; Chmeliov, Jevgenij; Kruger, T.P.J. (Tjaart); Valkunas, Leonas; Van Grondelle, Rienk (Royal Society of Chemistry, 2015-08)
    In light harvesting complex II (LHCII) of higher plants and green algae, carotenoids (Cars) have an important function to quench chlorophyll (Chl) triplet states and therefore avoid the production of harmful singlet ...
  • Scanning electron microscopy of the surfaces of ion implanted SiC 
    Malherbe, Johan B.; Van der Berg, Nic (Nicolaas George); Kuhudzai, Remeredzai Joseph; Hlatshwayo, Thulani Thokozani; Thabethe, Thabsile Theodora; Odutemowo, Opeyemi Shakirah; Theron, C.C. (Chris); Friedland, Erich Karl Helmuth; Botha, A.J.; Wendler, E. (Elsevier, 2015-07)
    This paper gives a brief review of radiation damage caused by particle (ions and neutrons) bombardment in SiC at different temperatures, and its annealing, with an expanded discussion on the effects occurring on the ...
  • On marginal deformations and non-integrability 
    Giataganas, Dimitrios; Zayas, Leopoldo A. Pando; Zoubos, Konstantinos (SpringerOpen Journal, 2014-01)
    We study the interplay between a particular marginal deformation of N = 4 super Yang-Mills theory, the β deformation, and integrability in the holographic setting. Using modern methods of analytic non-integrability of ...
  • Relative ergodic properties of C*-dynamical systems 
    Duvenhage, Rocco de Villiers; Mukhamedov, Farrukh (World Scientific Publishing, 2014-03)
    We study various ergodic properties of C*-dynamical systems inspired by unique ergodicity. In particular we work in a framework allowing for ergodic properties defined relative to various subspaces, and in terms of ...
  • Influence of radiation damage on krypton diffusion in silicon carbide 
    Friedland, Erich Karl Helmuth; Hlatshwayo, Thulani Thokozani; Van der Berg, Nic (Nicolaas George); Mabena, Chemist Mfanufikile (Elsevier, 2015-07)
    Diffusion of krypton in poly and single crystalline silicon carbide is investigated and compared with the previously obtained results for xenon, which pointed to a different diffusion mechanism than observed for chemically ...
  • Effect of alternative distributions of ground motion variability on results of probabilistic seismic hazard analysis 
    Pavlenko, V.A. (Springer, 2015-09)
    Probabilistic seismic hazard analysis (PSHA) is a regularly applied practice that precedes the construction of important engineering structures. The Cornell-McGuire procedure is the most frequently applied method of PSHA. ...
  • New periodic 6.7 GHz class II methanol maser associated with G358.460-0.391 
    Maswanganye, J.P.; Gaylard, M.J.; Goedhart, S.; Van der Walt, D.J.; Booth, Roy S. (Oxford University Press, 2015-01-21)
    Eight new class II methanol masers selected from the 6.7 GHz Methanol Multibeam survey catalogues I and II were monitored at 6.7 GHz with the 26m Hartebeesthoek Radio Astronomy Observatory (HartRAO) radio telescope for ...
  • Detailed balance and entanglement 
    Duvenhage, Rocco de Villiers; Snyman, Machiel (IOP Publishing, 2015-04)
    We study a connection between quantum detailed balance, which is a concept of importance in statistical mechanics, and entanglement. We also explore how this connection ts into thermo eld dynamics.
  • Hydrogen kinetics in a-Si:H and a-SiC:H thin films investigated by real-time ERD 
    Halindintwali, S.; Khoele, J.; Nemroaui, O.; Comrie, C.M.; Theron, C.C. (Chris) (Elsevier, 2015-04)
    Hydrogen effusion from hydrogenated amorphous silicon (a-Si:H) and amorphous silicon carbide (a-Si1 xCx:H) thin films during a temperature ramp between RT and 600 C was studied by in situ realtime elastic recoil detection ...
  • Transport characteristics of Pd Schottky barrier diodes on epitaxial n-GaSb as determined from temperature dependent current-voltage measurements 
    Venter, Andre; Murape, D.M.; Botha, J.R.; Auret, Francois Danie (Elsevier, 2015-01)
    Please read abstract in the article.
  • Laser-assisted synthesis, and structural and thermal properties of ZnS nanoparticles stabilised in polyvinylpyrrolidone 
    Onwudiwe, Damian C.; Kruger, T.P.J. (Tjaart); Jordaan, Anine; Strydom, C.A. (Christiena Adriana) (Elsevier, 2014-12)
    Zinc sulphide (ZnS) nanoparticles have been synthesised by a green approach involving laser irradiationof an aqueous solution of zinc acetate (Znac2) and sodium sulphide (Na2S·9H2O) or thioacetamide (TAA)in polyvinylpyrrolidone ...
  • Phase evolution of vanadium oxides obtained through temperature programmed calcinations of ammonium vanadate in hydrogen atmosphere and their humidity sensing properties 
    Akande, A.A.; Linganiso, E.C.; Dhonge, B.P.; Rammutla, K.E.; Machatine, Augusto Gonçalo Jose; Prinsloo, Linda Charlotta; Kunert, Herbert W.; Mwakikunga, B.W. (Elsevier, 2015-02)
    The possibility of obtaining vanadium dioxide (VO2) [wherein the vanadium ionic state is 4þ] from a precursor of ammonium metavanadate (NH4VO3) bearing the ion V5þ is investigated. The reduction is carried out by calcining ...
  • Classical analogue of the statistical operator 
    Plastino, Angelo; Plastino, Angel Ricardo (Angelo); Zander, Claudia (Springer, 2014-03)
    We advance the notion of a classical density matrix, as a classical analogue of the quantum mechanical statistical operator, and investigate its main properties. In the case of composite systems a partial trace-like operation ...
  • Long range annealing of defects in germanium by low energy plasma ions 
    Archilla, J.F.R.; Coelho, Sergio M.M.; Auret, Francois Danie; Dubinko, V.I.; Hizhnyakov, V. (Elsevier, 2015-03)
    Ions arriving at a semiconductor surface with very low energy (2–8 eV) are interacting with defects deep inside the semiconductor. Several different defects were removed or modified in Sb-doped germanium, of which the ...
  • Symmetric supercapacitors based on porous 3D interconnected carbon framework 
    Bello, Abdulhakeem; Barzegar, Farshad; Momodu, Damilola Y.; Dangbegnon, Julien K.; Taghizadeh, Fatemeh; Manyala, Ncholu I. (Elsevier, 2015-01)
    The construction and design of novel porous carbons for electric double-layer capacitors (EDLCs) application to meet the increasing demand and supply of energy is eminent. This is important because the pore volume ...
  • Simonkolleite-graphene foam composites and their superior electrochemical performance 
    Momodu, Damilola Y.; Barzegar, Farshad; Bello, Abdulhakeem; Dangbegnon, Julien K.; Masikhwa, T.M. (Tshifhiwa); Madito, M.J. (Moshawe); Manyala, Ncholu I. (Elsevier, 2015-01)
    Simonkolleite-graphene foam (SimonK/GF) composite has been synthesized by a facile solvothermal and environmentally friendly technique with excellent electrochemical properties. The obtained product was initially analyzed ...
  • P3HT:PCBM/nickel-aluminum layered double hydroxide-graphene foam composites for supercapacitor electrodes 
    Momodu, Damilola Y.; Bello, Abdulhakeem; Dangbegnon, Julien K.; Barzegar, Farshad; Fabiane, Mopeli; Manyala, Ncholu I. (Springer, 2015-02)
    In this paper, a simple dip-coating technique is used to deposit a P3HT:PCBM/Nickel Aluminum layered double hydroxide-graphene foam (NiAl-LDH-GF) composite onto a nickel foam (NF) serving as a current collector. A ...
  • Surface and interface modification of Zr/SiC interface by swift heavy ion irradiation 
    Njoroge, Eric Gitau; Theron, C.C. (Chris); Malherbe, Johan B.; Van der Berg, Nic (Nicolaas George); Hlatshwayo, Thulani Thokozani; Skuratov, V.A. (Elsevier, 2015-07)
    In this study thin Zr films (135 nm) were deposited on 6H-SiC substrate at room temperature by sputter deposition. The Zr/SiC couples were irradiated by 167 MeV Xe26+ ions at room temperature at fluences of 5.0 1012, ...
  • K-edge x-ray dichroism investigation of Fe1-xCoxSi : experimental evidence for spin polarization crossover 
    Hearne, G.R.; Diguet, G.; Baudelet, F.; Itié, J-P.; Manyala, Ncholu I. (Elsevier, 2015-04)
    Both Fe and Co K-edge x-ray magnetic circular dichroism (XMCD) have been employed as element-specific probes of the magnetic moments in the composition series of the disordered ferromagnet Fe1-xCoxSi (for x = 0.2, 0.3, ...