Browsing Research Articles (Physics) by Title

Browsing Research Articles (Physics) by Title

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  • Synthesis and characterization of porous carbon derived from activated banana peels with hierarchical porosity for improved electrochemical performance 
    Fasakin, Oladepo; Dangbegnon, Julien K.; Momodu, Damilola Y.; Madito, M.J. (Moshawe); Oyedotun, Kabir Oyeniran; Eleruja, M.A.; Manyala, Ncholu I. (Elsevier, 2018-02)
    Banana peels, a common fruit waste was adopted as a material precursor in this study to synthesize highly porous activated carbon from banana peels (ABP) which serves as an electrode material for a symmetric supercapacitor ...
  • Synthesis and microstructural characterization of kaolin-polyethylene composites 
    Agyei-Tuffour, B.; Bensah, Y.D.; Damoah, L.N.W.; Dodoo-Arhin, David; Yaya, A.; Nyankson, E.; Annan, A.; Sarkodee, E.; Efav, J.K. (Wiley, 2014-08)
    In this article, the preparation and characterization of kaolin/polyethylene composites are presented. Microstructural characteristics of six different kaolin–polyethylene composites with varying percentage compositions ...
  • Synthesis of 3D porous carbon based on cheap polymers and graphene foam for high-performance electrochemical capacitors 
    Barzegar, Farshad; Bello, Abdulhakeem; Fashedemi, Omobosede O.; Dangbegnon, Julien K.; Momodu, Damilola Y.; Taghizadeh, Fatemeh; Manyala, Ncholu I. (Elsevier, 2015-09)
    A scalable production of high surface area nanoporous carbon material (~ 2994 m2 g-1) with good distribution of micro-, meso- and macro-pores was hydrothermally synthesized using both cheap polymers and graphene foam as ...
  • 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.
  • 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. ...
  • Temperature-dependent current-voltage characteristics of Pd/ZnO Schottky barrier diodes and the determination of the Richardson constant 
    Mayimele, Meeheketo Advice; Diale, M. (Mmantsae Moche); Mtangi, Wilbert; Auret, Francois Danie (Elsevier, 2015-06)
    We report on a systematic investigation of temperature dependent current-voltage (I-V) characteristics of Pd/ZnO Schottky barrier diodes in the 30-300 K temperature range. The ideality factor was observed to decrease ...
  • Temperature-dependent growth mode of W-doped ZnO nanostructures 
    Ngom, Balla D.; Chaker, M.; Manyala, Ncholu I.; Lo, B.; Maaza, Malik; Beye, A.C. (Elsevier, 2011-03)
    We report on the effects of glass substrate temperature on the crystal structure and morphology of tungsten (W)-doped ZnO nanostructures synthesized by pulsed-laser deposition. X-ray diffraction analysis data shows that ...
  • THEMIS : a parameter estimation framework for the Event Horizon Telescope 
    Broderick, Avery E.; Gold, Roman; Karami, Mansour; Preciado-Lopez, Jorge A.; Tiede, Paul; Pu, Hung-Yi; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Balokovic, Mislav; Barrett, John; Bintley, Dan; Blackburn, Lindy; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Cho, Ilje; Conway, John E.; Cordes, James M.; Crew, Geoffrey B.; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Fish, Vincent L.; Fomalont, Ed; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Goddi, Ciriaco; Gómez, Jose L.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Inoue, Makoto; Issaoun, Sara; James, David J.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jung, Taehyun; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Jae-Young; Kim, Jongsoo; Kino, Motoki; Koay, Jun Yi; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Krame, Carsten; Krichbaum, Thomas P.; Kuo, Cheng-Yu; Lee, Sang-Sung; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; Lu, Ru-Sen; MacDonald, Nicholas R.; Mao, Jirong; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Matthews, Lynn D.; Menten, Karl M.; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Muller, Cornelia; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Okino, Hiroki; Olivares, Hector; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Palumbo, Daniel C.M.; Park, Jongho; Pen, Ue-Li; Pesce, Dominic W.; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Prather, Ben; Ramakrishnan, Venkatessh; Rao, Ramprasah; Rawlings, Mark G.; Raymond, Alexander W.; Rezzoll, Luciano; Ripperda, Bart; Roelof, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Rottmann, Helge; Ruszczyk, Chet; Ryan, Benjamin R.; Rygl, Kazi L.J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sasada, Mahito; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Tazaki, Fumie; Tilanus, Remo P.J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Traianou, Efthalia; Trippe, Sascha; Tsuda, Shuichiro; Van Bemmel, Ilse; Van Langevelde, Huib Jan; Van Rossum, Daniel R.; Wagner, Jan; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu., Qingwen; Yoon, Doosoo; Young, Andre; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guangyao; Zhao, Shan-Shan; Zhu, Ziyan (American Astronomical Society, 2020-07)
    The Event Horizon Telescope (EHT) provides the unprecedented ability to directly resolve the structure and dynamics of black hole emission regions on scales smaller than their horizons. This has the potential to ...
  • Theoretical comparison of real-time feedback-driven single-particle tracking techniques 
    Van Heerden, Bertus; Kruger, T.P.J. (Tjaart) (American Institute of Physics, 2022-08)
    Real-time feedback-driven single-particle tracking is a technique that uses feedback control to enable single-molecule spectroscopy of freely diffusing particles in native or near-native environments. A number of different ...
  • Theoretical investigation of the stability of crystalline silicon dicarbide 
    Andrew, Richard Charles; Braun, Max Willi Hermann; Chetty, Nithaya (Elsevier, 2012-04)
    While Si, C and SiC are very well known materials that have been extensively studied in their multitude of structures and allotropes, there is, surprisingly, a dearth of reliable information for off-50:50 compounds involving ...
  • Theoretical studies and simulation of gold-silica-gold multilayer "fanoshells" for sensing applications 
    Ugwuoke, Luke C.; Kruger, T.P.J. (Tjaart) (American Chemical Society, 2022-05)
    We develop a theoretical framework, based on a multipole, quasi-static approach, for the prediction of the localized surface plasmon resonances in Fanoshells formed via geometrical symmetry breaking in multilayer nanoshells ...
  • A theoretical study of thorium titanium-based alloys 
    Obodo, K.O. (Kingsley Onyebuchi); Chetty, Nithaya (Elsevier, 2013)
    Using theoretical quantum chemical methods, we investigate the dearth of ordered alloys involving thorium and titanium. Whereas both these elements are known to alloy very readily with various other elements, for example ...
  • Thermal annealing behaviour of Pd Schottky contacts on melt-grown single crystal ZnO studied by IV and CV measurements 
    Mtangi, Wilbert; Auret, Francois Danie; Chawanda, Albert; Jansen van Rensburg, P. J.; Coelho, Sergio M.M.; Nel, J.M.; Diale, M. (Mmantsae Moche); Van Schalkwyk, Louwrens; Nyamhere, Cloud (Elsevier, 2012-10)
    Current–voltage (IV) and capacitance–voltage (CV) measurement techniques have successfully been employed to study the effects of annealing highly rectifying Pd/ZnO Schottky contacts. IV results reveal a decrease in the ...
  • Thermal stability of Co, Ni, Pt or Ru Schottky contacts on n-Si and defects introduced thereon during contacts fabrication using electron beam deposition 
    Nyamhere, Cloud; Chawanda, Albert; Das, A.G.M.; Auret, Francois Danie; Hayes, M. (Elsevier, 2007-12-15)
    When using Schottky barrier diodes (SBDs) on silicon (Si) to study the thermal stability of radiation-induced defects, point defects injection into the silicon substrate can occur at temperatures where silicidation occurs. ...
  • Thermochromic nanocrystalline Au-VO2 composite thin films prepared by radiofrequency inverted cylindrical magnetron sputtering 
    Kana, J.B. Kana; Ndjaka, J.M.; Ngom, Balla D.; Manyala, Ncholu I.; Nemraoui, O.; Fasasi, A.Y.; Nemutudi, R.; Gibaud, A.; Knoesen, Dirk; Maaza, Malik (Elsevier, 2010-01)
    Highly crystalline Au-VO2 nanocomposite thin films were prepared on Corning glass substrates by reactive radiofrequency inverted cylindrical magnetron sputtering (ICMS). It is a low cost potential coating technology for ...
  • 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 ...
  • Three dimensional modelling of the components in supercapacitors for proper understanding of the contribution of each parameter to the final electrochemical performance 
    Barzegar, Farshad; Zhang, Lijun; Bello, Abdulhakeem; Manyala, Ncholu I.; Xia, Xiaohua (Royal Society of Chemistry, 2018-09)
    Three dimensional (3D) modelling of supercapacitors (SCs) has been investigated for the first time to have a better understanding of and study the effect of each parameter on the final electrochemical results. Based on ...
  • Ti- and Fe-related charge transition levels in beta-Ga2O3 
    Zimmermann, Christian; Frodason, Ymir Kalmann; Barnard, Abraham Willem; Varley, Joel Basile; Irmscher, Klaus; Galazka, Zbigniew; Karjalainen, Antti; Meyer, Walter Ernst; Auret, Francois Danie; Vines, Lasse (American Institute of Physics, 2020-02-18)
    Deep-level transient spectroscopy measurements on b-Ga2O3 crystals reveal the presence of three defect signatures labeled E2a; E2b, and E3 with activation energies at around 0.66 eV, 0.73 eV, and 0.95 eV below the conduction ...
  • Towards refining the classification of glass trade beads imported into Southern Africa from the 8th to the 16th century AD 
    Koleini, Farahnaz; Prinsloo, Linda Charlotta; Biemond, Wim M.; Colomban, Philippe; Ngo, Anh-Tu; Boeyens, Jan Christoffel Antonie; Van der Ryst, Maria M. (Elsevier, 2016-05)
    Tracing the origin of glass trade beads excavated at archaeological sites can contribute significantly to dating a site and reconstructing prehistoric trade routes. Wood developed a temporally sensitive bead sequence ...
  • Towards the first detection of strongly lensed H I emission 
    Blecher, Tariq; Deane, Roger; Heywood, Ian; Obreschkow, Danail (Royal Astronomical Society, 2019-04)
    Please read abstract in the article.