Mr
George Okyere Dwapanyin
(Stellenbosch University)
29/01/2019, 16:30
AfLS2 track
Poster Presentations
The in-depth study of the basic units of life requires the ability to probe deeper into cells and tissues in order to fully comprehend their functions. In recent years, multiple linear optical imaging techniques (Confocal, STED, Single Molecule Localized Microscopy etc.) have been developed in a number of different laboratories, all aimed at probing deeper into biological tissue and enhancing...
Dr
Papa Lat Tabara SOW
(Université Alioune DIOP de Bambey)
29/01/2019, 16:35
AfLS2 track
Poster Presentations
The quantum cascade lasers (QCL) are popular sources for spectroscopy in the field of mid-infrared because of the wide range of wavelengths they can cover (3 μm <λ< 24 μm). Several examples of spectroscopic measurements with spectrometers based on QCL, have been demonstrated [2].
We are currently developing a laser spectrometer based on a QCL which emits around 10 μm. The selection of...
Dr
Nicholas Ade
(University of the Free State, Bloemfontein, SA)
29/01/2019, 16:40
AfLS2 track
Poster Presentations
Radiotherapy is a well-established treatment modality for pelvic lesions. Hip replacement is a surgical procedure in which the hip joint is replaced by a prosthetic implant. During irradiation of malignancies in the hip or pelvic region with external megavoltage beams, the presence of metallic prostheses complicates dosimetry and treatment delivery due to the dose perturbation effect of high-Z...
Dr
Prosper Ngabonziza
(Max Planck Institute for Solid State Research)
29/01/2019, 16:45
AfLS2 track
Poster Presentations
In situ characterization of quantum materials, in particular topological insulator nanomaterials using several, and complementary surface analysis techniques enables to investigate topological surface states without exposing the samples to ambient conditions. Adsorbants from exposure to air and other ex situ contaminations result in notable changes in the bulk and surface state properties of...
Mr
Michael Ogunbunmi
(University of Johannesburg)
29/01/2019, 16:50
AfLS2 track
Poster Presentations
We have investigated the physical and magnetic properties of the hexagonal Kagome lattice structure compound Pr3Os4Al12 which crystallizes in the hexagonal Gd3Ru4Al12-type structure with space group P63/mmc (No. 194). The compound shows a long-range magnetic ordering of the Pr3+ moment at TC = 37 K as indicated by the temperature dependences of magnetic susceptibility, specificc heat and...
Dr
Mubarak Yagoub
(University of the Free State)
29/01/2019, 17:00
AfLS2 track
Poster Presentations
Lanthanide-based luminescent nano-materials have been extensively investigated due to their contribution to a different range of applications. The use of lanthanide ions for enhancing the solar cell efficiency has recently been reported. Silicon based solar cells show a poor response to UV–blue range of the solar spectrum. This limits the crystalline silicon (c-Si) solar cell efficiency to...
Dr
Emmanuel Igumbor
(University of Pretoria)
29/01/2019, 17:15
AfLS2 track
Poster Presentations
The electronic behaviour of high-dose phosphorus implanted in 4H-SiC is mainly desirable to obtained lower sheet resistance of 4H-SiC. Al doping on the other hand acts as an acceptor, improves the dielectric properties of 4H-SiC and has very low diffusivity in SiC. Using a hybrid density functional theory, we investigated the properties of Al and P defect-complexes in 4H-SiC a wide band-gap...
Mr
L.L. Collieus
(Botswana International University of Science and Technology)
29/01/2019, 17:25
AfLS2 track
Poster Presentations
Control and manipulation of residual stresses in thin films is key in attaining coatings with high mechanical and tribo-logical performance. This work, therefore, focused on investigating residual stresses generated in WC-Co thin film coatings, deposited on mild steel substrates by magnetic sputtering. The effect of deposition parameters on the generation of these stresses was analyzed on the...
Dr
Schadrack Nsengiyumva
(Rhodes University)
29/01/2019, 17:30
AfLS2 track
Poster Presentations
The influence of hydrogenation on residual stresses in oxygen-implanted Ti-6Al-4V alloy is reported. Prior to hydrogenation, oxygen ions were implanted in Ti-6Al-4V samples at fluence 3x1017 ions/cm2 with energies 50 keV at room temperature and 5500C, 100 keV and 150 keV at 5500C. Hydrogenation was carried out on all samples at 5500C for two hours. Residual stresses were analysed by X-ray...
Mr
Mohamed Hedi TRABELSI
(CNSTN)
29/01/2019, 17:35
AfLS2 track
Poster Presentations
This work will show some electrical pollution and problems (ineternal and external), met on tunisian Facility , equiped with a LINAC type of Electron beam accelerators (Power:5Kw; Energy:10 MeV) used in many installation as an injector in synchrotrones, and we will discuss some solutions for this electrical problems.
We will present some damages that can arised on systems of this type of...
Mr
Rémi NDIOUKANE
(Laboratoire de Chimie et de Physique des Matériaux (LCPM), Assane Seck University of Ziguinchor - Senengal)
29/01/2019, 17:40
AfLS2 track
Poster Presentations
Perovskite solar cells have become a very hot research topic in photovoltaics community. Since the initial reports on solid state perovskite solar cells with efficiency of 10 % in 2012 [1,2], there has been a rapid increase in the number of publications in this area as well as rapid increase in the reported efficiencies. Certified record efficiency according to NREL now exceeds 22 %. Despite...
Dr
Jack Kasahara
(Lyncean Technologies, Inc.)
29/01/2019, 17:45
AfLS2 track
Poster Presentations
The Lyncean Compact Light Source (CLS) is a “table-top” synchrotron that provides many of the beam qualities found at a large government operated synchrotron, such as high flux, quasi-monochromatic and continuously energy tunable. These beam qualities enable a variety of synchrotron quality measurements to be performed such as imaging/CT, diffraction, scattering and spectroscopy, making the...
