Výsledky vyhledávání - "Dave G. Billing"

Synthesis, structural characterization, and magnetic properties of mixed ternary spinel-type Mn-Ni-Co oxides

Autor: A. R. E. Prinsloo, C. J. Sheppard, Tarekegn Heliso Dolla, Karin Pruessner, Patrick Ndungu, Dave G. Billing

Publikováno v: Materials Today: Proceedings. 5:10488-10495

Mixed ternary spinel-type oxides MnxNi1-xCo2O4 (x = 0, 0.5, 1) were synthesized using a citrate sol-gel route. The morphologies and structures of the mixed oxide nanoparticles were characterized using Transmission Electron Microscopy (TEM), Scanning

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a6c232d3621a2cbac7610cf3628eb0b
https://doi.org/10.1016/j.matpr.2017.12.380

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Optoelectronic and mechanical properties of PVD diamond-like carbon films

Autor: Rudolph M. Erasmus, Dave G. Billing, B.A. Mathe, Daniel Wamwangi, Wilfred M. Mbiombi, Arthur G. Every

Publikováno v: Materials Today: Proceedings. 5:27307-27315

The role of sp3and sp2 bonding and hydrogen content on the optical, electronic and elastic properties of diamond-like carbon (DLC) thin films is investigated. The films were prepared using a graphite target and CH4/Ar ambient by RF and DC reactive ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1aacb18d30e9e576dee04286370bf2c5
https://doi.org/10.1016/j.matpr.2018.08.156

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Elastic and magnetic properties of Tb-MnO based thin films

Autor: Adam Shnier, Rudolph M. Erasmus, Dave G. Billing, M. Madhuku, B.A. Mathe, G. Mwendwa, Daniel Wamwangi

Publikováno v: Journal of Magnetism and Magnetic Materials. 537:168199

We report on the elastic and magnetic properties of multiferroic Tb0.3Mn20.9O78.8 thin films. The films were deposited on (0 0 1) Si using radio frequency magnetron (RF) sputtering at 50 W and ambient temperature. The elastic properties have been est

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::90673427ad991458c024524f24391f5e
https://doi.org/10.1016/j.jmmm.2021.168199

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Tuning structural, electrical and mechanical properties of diamond-like carbon films by substrate bias voltage

Autor: Daniel Wamwangi, Dave G. Billing, Rudolph M. Erasmus, B.A. Mathe, Wilfred M. Mbiombi, Arthur G. Every, Bryan P. Doyle, Emanuela Carleschi

Publikováno v: Materials Today Communications. 28:102501

Diamond-like carbon (DLC) thin films are deposited by unbalanced RF magnetron sputtering at substrate bias voltages to tune the ratio of the sp3 to sp2 bonds and hydrogen composition in optimized Ar: CH4 ambient. The effect of substrate bias voltage

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f2e829fa4f2011bab6e479ba59d26728
https://doi.org/10.1016/j.mtcomm.2021.102501

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Role of microstructure and stress evolution on the elastic constants of multiferroic oxide-based thin films

Autor: Thomas Wittkowski, Dave G. Billing, Darrell J. Comins, Kudakwashe Jakata, Daniel Wamwangi, E.G. Njoroge, Fekadu H. Ayele

Publikováno v: Oxide-based Materials and Devices X.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a983f590e0b5986b42f8189a67f451a
https://doi.org/10.1117/12.2518314

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The effect of sputtered Pt40Pd57Al3 thin film thickness on SO2(aq) electro-oxidation

Autor: R.J. Kriek, Adam Shnier, Zarco Geldenhuys, Dave G. Billing, Daniel Wamwangi, Anzel Falch

The influence of sputtered Pt40Pd57Al3 thin films of varying thickness, in the as-deposited (AD) and annealed (AN) state, was investigated for the electro-oxidation of aqueous SO2. From physical characterisation (scanning electron microscopy (SEM) an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3dfb2ac82920f5c0e99927d07af6401
https://hdl.handle.net/10394/34513

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Elastic properties and lattice thermal conductivity of amorphous Ge2Sb2Te5 and GeTe thin films

Autor: Daniel Wamwangi, M. Baloi, Dave G. Billing, B.A. Mathe, P. Sechogela, M. Madhuku, Rudolph M. Erasmus

Publikováno v: Journal of Applied Physics. 129:135102

This study reports on the elastic properties and the lattice thermal conductivity of amorphous Ge2Sb2Te5 and GeTe thin films using surface Brillouin scattering. It is demonstrated that this method allows for the determination of the isotropic elastic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd2fbe50e1fee4993ced80a6eded904d
https://doi.org/10.1063/5.0041242

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Minimum lattice thermal conductivity of In3SbTe2 by surface Brillouin scattering

Autor: Dave G. Billing, Keshaan Singh, M. Madhuku, B.A. Mathe, Daniel Wamwangi

Publikováno v: Journal of the Optical Society of America A. 37:C132

Phase-change materials are chalcogenide alloys used for nonvolatile memory applications due to their rapid and reversible structural transformation. I n 3 S b T e 2 is a promising candidate that exhibits transitions dependent on thermal conductivity.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ca6f36a4c2087442a3854dd9bcb6224
https://doi.org/10.1364/josaa.399149

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Surface Brillouin scattering study of tantalum nitride (TaN) thin films

Autor: Darrell J. Comins, Jonah Kuria, Daniel Wamwangi, Arthur G. Every, Dave G. Billing

Publikováno v: Journal of the Optical Society of America A. 37:C125

Elastic properties of TaN films on (001)Si are investigated by surface Brillouin scattering (SBS). The velocity dispersion is obtained from Brillouin frequency shifts and surface acoustic wave phase velocities derived from measured SBS spectra. The o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1ad2cc9b09d76c2c61e882023529e72
https://doi.org/10.1364/josaa.398746

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