Browsing Research Articles (Physics) by Type "Article"

Browsing Research Articles (Physics) by Type "Article"

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  • Ab initio studies of bimetallic-doped {0001} hematite surface for enhanced photoelectrochemical water splitting 
    Simfukwe, Joseph; Mapasha, Refilwe Edwin; Braun, Artur; Diale, M. (Mmantsae Moche) (MDPI, 2021-08)
    First-principles calculations based on density functional theory (DFT) were carried out to study the energetic stability and electronic properties of a bimetallic-doped α-Fe2O3 photoanode surface with (Zn, Ti) and (Zn, ...
  • Ab initio studies of isolated boron substitutional defects in graphane 
    Mapasha, Refilwe Edwin; Chetty, Nithaya (IOP Publishing Limited, 2017)
    We have systematically studied energetics, structural and electronic properties of di erent con gurations of the B atoms substituting C-H pairs located on a single hexagonal ring in a graphane system using the rst-principles ...
  • An ab-initio study of P-type ZrCoY (Y[dbnd]Sb and Bi) half – Heusler semiconductors 
    Allan, Lynet; Mulwa, Winfred M.; Mwabora, Julius M.; Musembi, Robinson J.; Mapasha, Refilwe Edwin (Elsevier, 2023-08)
    Please read abstract in article.
  • Ab-initio study of the optical properties of beryllium-sulphur co-doped graphene 
    Olaniyan, Okikiola; Igumbor, Emmanuel; Khaleed, Abubakar A.; Mirghni, Abdulmajid Abdallah; Manyala, Ncholu I. (American Institute of Physics, 2019)
    Graphene is a carbon material with excellent properties, which makes it applicable in a myriad of applications. However, the range of the applications of graphene can be extended to the developing field of nanoelectronics ...
  • Accuracy of approximate methods for the calculation of absorption-type linear spectra with a complex system–bath coupling 
    Nothling, Johan A.; Mancal, Tomas; Kruger, T.P.J. (Tjaart) (American Institute of Physics, 2022-09)
    Please read abstract in the article.
  • Advanced analysis of single-molecule spectroscopic data 
    Botha, Joshua Leon; Van Heerden, Bertus; Kruger, T.P.J. (Tjaart) (Biophysical Society, 2024-09)
    We present Full SMS, a multipurpose graphical user interface (GUI)-based software package for analyzing single molecule spectroscopy (SMS) data. SMS typically delivers multiparameter data—such as fluorescence brightness, ...
  • AGN feeding and feedback in fornax a : kinematical analysis of the multi-phase ISM 
    Maccagni, Filippo M.; Serra, Paolo; Gaspari, M.; Kleiner, Dane; Morokuma-Matsui, K.; Oosterloo, T.A.; Onodera, M.; Kamphuis, Peter; Loi, F.; Thorat, Kshitij; Ramatsoku, Mpati; Smirnov, Oleg M.; White, S.V. (Hans Publishers, 2021-12)
    We present a multi-wavelength study of the gaseous medium surrounding the nearby active galactic nucleus (AGN), Fornax A. Using MeerKAT, ALMA, and MUSE observations, we reveal a complex distribution of the atomic (H i), ...
  • Analytic structure of the multichannel Jost matrix for potentials with Coulombic tails 
    Rakityansky, Sergei Anatoljevich; Elander, N. (American Institute of Physics, 2013-12-31)
    A quantum system is considered that can move in N two-body channels with the potentials that may include the Coulomb interaction. For this system, the Jost matrix is constructed in such a way that all its dependencies ...
  • ApcE plays an important role in light-induced excitation energy dissipation in the Synechocystis PCC6803 phycobilisomes 
    Assefa, Gonfa Tesfaye; Botha, Joshua Leon; Van Heerden, Bertus; Kyeyune, Farooq; Kruger, T.P.J. (Tjaart); Gwizdala, Michal (Springer, 2024-04)
    Phycobilisomes (PBs) play an important role in cyanobacterial photosynthesis. They capture light and transfer excitation energy to the photosynthetic reaction centres. PBs are also central to some photoprotective and ...
  • Ar plasma induced deep levels in epitaxial n-GaAs 
    Venter, Andre; Nyamhere, Cloud; Botha, J.R.; Auret, Francois Danie; Janse van Rensburg, J.P.; Meyer, Walter Ernst; Coelho, Sergio M.M.; Kolkovsky, V.I. (American Institute of Physics, 2012-03-08)
    Ar plasma etching of n-type (Si doped) GaAs introduces several electron traps (Ec - 0.04 eV, Ec - 0.07 eV, Ec - 0.19 eV, Ec - 0.31 eV, Ec - 0.53 eV, and Ec - 0.61 eV). The trap, Ec - 0.04 eV, labelled E10 and having a ...
  • At the end of cosmic noon : short gas depletion times in unobscured quasars at z ∼1 
    Castillo, Frias M.; Rybak, M.; Hodge, Jacqueline; Van Der Werf, Paul; Abbo, Lars; Ballieux, Femke; Ward, Samuel R.; Harrison, Chris; Rivera, G. Calistro; McKean, J.P.; Stacey, Hannah R. (EDP Sciences, 2024-03)
    Please read abstract in article.
  • The behavior of hydrothermally synthesized hematite nanorods prepared on spin coated seed layers 
    Talibawo, Joan; Nyarige, Justine Sageka; Kyesmen, Pannan Isa; Cyulinyana, Marie C.; Diale, M. (Mmantsae Moche) (IOP Publishing, 2022-02)
    Please read abstract in the article.
  • Blue- and red-shifts of V2O5 phonons in NH3 environment by in situ Raman spectroscopy 
    Akande, Amos Adeleke; Machatine, Augusto Gonçalo Jose; Masina, Bathusile; Chimowa, George; Matsoso, Boitumelo; Roro, Kittessa; Duvenhage, Mart-Mari; Swart, Hendrik; Bandyopadhyay, Jayita; Ray, Suprakas Sinha; Mwakikunga, Bonex Wakufwa (IOP Publishing, 2018)
    A layer of ~30 nm V2O5/100 nm-SiO2 on Si was employed in the in situ Raman spectroscopy in the presence of NH3 effluent from a thermal decomposition of ammonium acetate salt with the salt heated at 100 °C. When the layer ...
  • Brightest cluster galaxy formation in the z = 4.3 protocluster SPT 2349-56 : discovery of a radio-loud active galactic nucleus 
    Chapman, S.C.; Hill, Ryley; Aravena, Manuel; Archipley, Melanie; Babul, Arif; Burgoyne, James; Canning, Rebecca E. A.; Deane, Roger; De Breuck, Carlos; Gonzalez, Anthony H.; Hayward, Christopher C.; Kim, Seon Woo; Malkan, Matt; Marrone, D.P.; McIntyre, Vincent; Murphy, Eric J.; Pass, Emily; Perry, Ryan W.; Phadke, Kedar A.; Rennehan, Douglas; Reuter, Cassie; Rotermund, Kaja M.; Scott, Douglas; Seymour, Nick; Solimano, Manuel; Spilker, Justin; Stark, Anthony A.; Sulzenauer, Nikolaus; Tothill, Nick; Vieira, Joaquin D.; Vizgan, David; Wang, George; Weiss, Axel (IOP Publishing, 2024-01)
    Please read abstract in article.
  • Broadband multi-wavelength properties of M87 during the 2017 Event Horizon Telescope campaign 
    Algaba, Juan Carlos; Anczarski, J.; Asada, K.; Balokovic, M.; Chandra, S.; Cui, Y.-Z.; Falcone, A.D.; Giroletti, M.; Goddi, Ciriaco; Hada, K.; Haggard, D.; Jorstad, S.; Kaur, A.; Kawashima, T.; Keating, G.; Kim, J.-Y.; Kino, M.; Komossa, S.; Kravchenko, E.V.; Krichbaum, T.P.; Lee, S.-S.; Lu, R.-S.; Lucchini, M.; Markoff, S.; Neilsen, J.; Nowak, M.A.; Park, J.; Principe, G.; Ramakrishnan, V.; Reynolds, M.T.; Sasada, M.; Savchenko, S.S.; Williamson, K.E.; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Barrett, John; Bintley, Dan; Benson, Bradford A.; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Gold, Roman; Gomez, José L.; Gomez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosales, Alejandra; Johnson, Michael D.; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kettenis, Mark; Kim, Dong-Jin; Kim, Jongsoo; Kim, Junhan; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Kuo, Cheng-Yu; Lauer, Tod R.; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Ivan; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Muller, Cornelia; Musoke, Gibwa; Mejías, Alejandro Mus; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Ner, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Okino, Hiroki; Olivares, Hector; Ortiz-León, Gisela N.; Oyama, Tomoaki; Ozel, Feryal; Palumbo, Daniel C. M.; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Potzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sanchez, Salvador; Sanchez-Argüelles, David; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; Bemmel, Ilse van; Van Langevelde, Huib Jan; Van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan (American Astronomical Society, 2021-04-14)
    In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for ...
  • Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors 
    Mahmoud, Badr Ahmed Mohammed; Mirghni, Abdulmajid Abdallah; Fasakin, Oladepo; Oyedotun, Kabir Oyeniran; Manyala, Ncholu I. (Royal Society of Chemistry, 2020-04)
    Unique microstructured nickel ammonium phosphate Ni(NH4)2(PO3)4$4H2O and Ni(NH4)2(PO3)4$4H2O/GF composite were successfully synthesized through the hydrothermal method with different graphene foam (GF) mass loading of ...
  • The challenges of developing computational physics : the case of South Africa 
    Salagaram, Trisha; Chetty, Nithaya (IOP Publishing Limited, 2013-11-21)
    Most modern scientific research problems are complex and interdisciplinary in nature. It is impossible to study such problems in detail without the use of computation in addition to theory and experiment. Although it is ...
  • Characterization of the E(0.31) defect introduced in bulk n-Ge by H or He plasma exposure 
    Nyamhereme, C.; Venter, Andre; Auret, Francois Danie; Coelho, Sergio M.M.; Murape, D.M. (American Institute of Physics, 2012-02-29)
    Bulk antimony (Sb) doped germanium (n-Ge) samples with doping concentrations ranging between 7.0 1014 cm 3 and 2.5 1015 cm 3 were exposed to a dc-hydrogen or helium plasma. Hydrogen exposure resulted in the introduction ...
  • Characterizing and mitigating intraday variability : reconstructing source structure in accreting black holes with mm-VLBI 
    Broderick, Avery E.; Gold, Roman; Georgiev, Boris; Pesce, Dominic W.; Tiede, Paul; Ni, Chunchong; Moriyama, Kotaro; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Cheno, Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cuio, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Dhruv, Vedant; Doeleman, Sheperd S.; Dougal, Sean; Dzib, Sergio A.; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph R.; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Goddi, Ciriaco; Gomez-Ruiz, Arturo I.; Gomez, Jose L.; Gu, Minfeng; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Haworth, Kari; Hecht, Michael H.; Hesper, Ronald; Heumann, Dirk; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Impellizzeri, C.M. Violette; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jimenez-Rosale, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Joshi, Abhishek V.; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kawashima, Tomohisa; Keating, Garrett K.; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Koay, Jun Yi; Kocherlakota, Prashant; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Carsten; Kramer, Michael; Krichbaum, Thomas P.; Kuo, Cheng-Yu; La Bella, Noemi; Lauer, Tod R.; Lee, Daeyoung; Lee, Sang-Sung; Leung, Po Kin; Levis, Aviad; Li, Zhiyuan; Lico, Rocco; Lindahl, Greg; Lindqvist, Michael; Lisakov, Mikhail; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin J.; Lu, Ru-Sen; Mao, Jirong; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Marti-Vidal, Iván; Matsushita, Satoki; Matthews, Lynn D.; Menten, Karl M.; Michalik, Daniel; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moscibrodzka, Monika; Muller, Cornelia; Mus, Alejandro; Musoke, Gibwa; Myserlis, Ioannis; Nadolski, Andrew; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Fuentes, Santiago Navarro; Neilsen, Joey; Neri, Roberto; Noutsos, Aristeidis; Nowak, Michael A.; Oh, Junghwan; Okino, Hiroki; Olivares, Héctor; Ortiz-Leon, Gisela N.; Oyama, Tomoaki; Palumbo, Daniel C. M.; Paraschos, Georgios Filippos; Park, Jongho; Parsons, Harriet; Patel, Nimesh; Pen, Ue-Li; Pietu, Vincent; Plambeck, Richard; PopStefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-Lopez, Jorge A.; Pu, Hung-Yi; Ramakrishnan, Venkatessh; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Romero-Canizales, Cristina; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruiz, Ignacio; Ruszczyk, Chet; Rygl, Kazi L. J.; Sanchez, Salvador; Sanchez-Arguelles, David; Sanchez-Portal, Miguel; Sasada, Mahito; Satapathy, Kaushik; Savolainen, Tuomas; Schloerb, F. Peter; Schonfeld, Jonathan; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; SooHoo, Jason; Souccar, Kamal; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tilanus, Remo P. J.; Titus, Michael; Torne, Pablo; Traianou, Efthalia; Trent, Tyler; Trippe, Sascha; Turk, Matthew; Van Bemmel, Ilse; Van Langevelde, Huib Jan; Van Rossum, Daniel R.; Vos, Jesse; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wiik, Kaj; Witzel, Gunther; Wondrak, Michael F.; Wong, George N.; Wu, Qingwen; Yamaguchi, Paul; Yoon, Doosoo; Young, Andre; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhang, Shuo; Zhao, Shan-Shan (American Astronomical Society, 2022-05)
    The extraordinary physical resolution afforded by the Event Horizon Telescope has opened a window onto the astrophysical phenomena unfolding on horizon scales in two known black holes, M87* and Sgr A*. However, with this ...
  • Classical typicality of the canonical distribution 
    Plastino, Angel Ricardo (Angelo); Daffertshofer, A. (EPLA, 2008-11)
    We consider the typicality of the canonical ensemble’s probability distribution from a classical perspective, resuming recent discussions on quantum-mechanical aspects of canonical typicality. In the conventional derivation ...