Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Johannes H. Neethling"'
Autor:
F. Di Fonzo, E.J. Olivier, I. Jóźwik, M. Clozel, Ryszard Diduszko, Alexander Azarov, M. Vanazzi, Łukasz Kurpaska, J.H. O'Connell, M. Frelek-Kozak, Johannes H. Neethling, Jacek Jagielski, A. Zaborowska
Publikováno v:
Ceramics International. 47:34740-34750
In this study structural and mechanical properties of a 1 μm thick Al2O3 coating, deposited on 316L stainless steel by Pulsed Laser Deposition (PLD), subjected to high energy ion irradiation were assessed. Mechanical properties of pristine and ion-m
Autor:
Giulia Spezzati, Shunsuke Asahina, Emiel J. M. Hensen, E.J. Olivier, Jan P. Hofmann, Angelica Benavidez, Jeffrey T. Miller, Yaqiong Su, Johannes H. Neethling, Abhaya K. Datye, Andrew DeLaRiva
Publikováno v:
Applied Catalysis. B, Environmental, 243, 36-46. Elsevier
Pd/CeO2 is an active component in emission control catalysts for CO oxidation. Nanostructured CeO2 powders can be prepared in the form of rods exposing predominantly (111) surfaces and cubes exposing (100) surfaces. While differences in the reactivit
Autor:
A. van Vuuren, F. F. Komarov, M. A. Makhavikou, L. A. Vlasukova, Irina N. Parkhomenko, I. A. Romanov, O. V. Milchanin, Johannes H. Neethling, Elke Wendler
Publikováno v:
Materials Letters. 308:131070
High-fluence ion implantation has been applied to create silica-based light-emitting nanocomposite for silicon photonics. Samples of SiO2/Si have been implanted with Sn ions (80 keV, 2.5 × 1016 cm−2, 5 × 1016 cm−2 and 1 × 1017 ion/cm2) and aft
Autor:
P. A. van Aken, Christopher S. Allen, Robin E. Kroon, Angus I. Kirkland, E.J. Olivier, Hidetaka Sawada, S.R. Naidoo, Johannes H. Neethling
Publikováno v:
Nature Materials. 17:243-248
In the past decades, many efforts have been devoted to characterizing {001} platelet defects in type Ia diamond. It is known that N is concentrated at the defect core. However, an accurate description of the atomic structure of the defect and the rol
Autor:
K. Mulewska, A. Ibrayeva, N.S. Kirilkin, Vladimir A. Skuratov, M. Clozel, E.A. Korneeva, A. Janse van Vuuren, M.V. Zdorovets, L. Kurpaska, Johannes H. Neethling
Publikováno v:
Journal of Nuclear Materials. 555:153120
We report the results of the nanoindentation tests of silicon nitride irradiated with Ar (46 MeV), Kr (107 MeV), Xe (167 MeV, 220 MeV) and Bi (710 MeV) ions. The behaviour of hardness with respect to ion fluence was analyzed and correlated with the m
Autor:
I.A. Saladukhin, Johannes H. Neethling, Gregory Abadias, S.V. Zlotski, I. V. Safronov, A. Janse van Vuuren, Vladimir V. Uglov, J.H. O'Connell, V.I. Shymanski, V.A. Skuratov
Publikováno v:
Vacuum. 143:491-494
The article reports on the TEM investigations of microstructure features after Xe irradiation (360 keV and 5 × 1016 cm−2) of ZrN, Si3N4 monolithic films and ZrN/SiNx multilayered film deposited by magnetron sputtering. Results of TEM study of ZrN
Publikováno v:
Journal of Crystal Growth. 458:53-59
In this work, the near-infrared photoluminescence (PL) of InSb/GaSb QD structures grown on GaSb substrate (2° off (100)) using atmospheric pressure Metalorganic Vapor Phase Epitaxy is investigated. The structures are analyzed before capping and afte
Autor:
Alisa Govender, Roy P. Forbes, E.J. Olivier, Eric van Steen, Johannes H. Neethling, Werner Barnard
Publikováno v:
Materials Characterization. 121:93-102
Premade nickel ferrite (NiFe 2 O 4 ) nanoparticles were used as a core around which cobalt (II, III) oxide (Co 3 O 4 ) was grown. In an attempt to vary the shell thickness, the concentration of Co used was varied. It was found that the concentration
Autor:
Alisa Govender, E.J. Olivier, Bryan P. Doyle, Eric Prestat, Eric van Steen, Roy P. Forbes, Emanuela Carleschi, Johannes H. Neethling, Sarah J. Haigh, Werner Barnard, Hendrik Van Rensburg
Publikováno v:
Materials Characterization
Govender, A, Olivier, E J, Carleschi, E, Prestat, E, Haigh, S J, Van Rensburg, H, Doyle, B P, Barnard, W, Forbes, R P, Neethling, J H & Van Steen, E 2019, ' Morphological and compositional changes of MFe2O4@Co3O4 (M = Ni, Zn) core-shell nanoparticles after mild reduction ', Materials Characterization, pp. 109806 . https://doi.org/10.1016/j.matchar.2019.109806
Govender, A, Olivier, E J, Carleschi, E, Prestat, E, Haigh, S J, Van Rensburg, H, Doyle, B P, Barnard, W, Forbes, R P, Neethling, J H & Van Steen, E 2019, ' Morphological and compositional changes of MFe2O4@Co3O4 (M = Ni, Zn) core-shell nanoparticles after mild reduction ', Materials Characterization, pp. 109806 . https://doi.org/10.1016/j.matchar.2019.109806
NiFe2O4@Co3O4 and ZnFe2O4@Co3O4 core-shell nanoparticles were synthesized and reduced to be used as catalysts for the Fischer-Tropsch synthesis. The as-synthesized materials were determined to have an incomplete Co3O4 shell around the ferrite core wi
Autor:
Sarah J. Haigh, E.J. Olivier, E. du Plessis, Eric Prestat, Johannes H. Neethling, M.J. Coombes
Publikováno v:
Applied Catalysis A: General. 613:118031
The effect of silica-promotion on the reduction of iron oxides in hydrogen was investigated using in situ X-ray diffraction and aberration-corrected transmission electron microscopy to understand the mechanism of reduction and the identity of the iro