Prof Wiets Roos
Position
Professor
Department
Physics
Address
4 105
Physics
IB 51
Telephone
051 4012925
Office
Physics Building 105
Information

Short CV

B.Sc. (UFS), B.Sc. Hons. (UFS), M.Sc. (UFS), Ph.D.(UFS)

 

Publications (Short List)

 

  1. CJ Jafta, WD Roos, JJ Terblans and AB Hugo. “A pressurized Ar-filled annealing system”, Journal of Instrumentation Science and Technology, 38: 4, 261 - 267, 2010.
  2. RE Kroon, S. Cronje, WD Roos and TJ Cloete. “Annealing-Induced Softening of Copper and Molybdenum for High Strain Rate Deformation”, Met. Mater. Int., Vol. 17, No. 4, 671, 2011.
  3. CJ Jafta, WD Roos, JJ Terblans, J.K.O. Asante and K.I.Ozoemena. “The Surface Orientation Dependence of the Pre-Exponential Factors Extracted from the Segregation Profiles of a Cu(111/110) Bi-crystal “, Proceedings of SAIP2011, 111, 2011.
  4. HAA Seed Ahmed, WD Roos , OM Ntwaeaborwa, HC Swart and RE Kroon. “Effect of annealing on the Ce3+/Ce4+ ratio measured by XPS in luminescent SiO2:Ce”, Proceedings of SAIP2011, 280, 2011.
  5. S Cronjé, WD Roos, RE Kroon and JKO Asante. “Measuring the effect of surface evaporation on the segregation process”, Proceedings of SAIP2011, 68, 2011.
  6. GF Ndlovu,,JKO Asante, WD Roos and KT Hillie. “The decoration of vicinal copper polycrystalline surfaces by Antimony “, Proceedings of SAIP2011, 249, 2011.
  7. 7.G.F. Ndlovu, JKO Asante, WD Roos and KT Hillie. “Investigation of broken symmetry of Sb/Cu(111) surface alloys by VT-STM “, Proceedings of SAIP2011, 243, 2011.
  8. Gebhu F Ndlovu, Wiets D Roos, Zhiming M Wang, Joseph KO Asante, Matete G Mashapa, Charl J Jafta, Bonex W Mwakikunga and Kenneth T Hillie. “Epitaxial deposition of silver ultra-fine nanoclusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in situ STM, ex situ XPS, and ab initio calculations “. Nanoscale Research Letters 2012, 7:173 1-8.
  9. JKO Asante and WD Roos. “Comparing segregation profiles of Sn and Sb in single and polycrystalline Cu”. Surface Review and Letters, Vol. 19, No 1, 1-4, 2012.
  10. Charl J. Jafta, Kenneth I. Ozoemena, Mkhulu K. Mathe and Wiets D. Roos. “Synthesis, Characterisation and Electrochemical Intercalation Kinetics of Nanostructured Aluminium-Doped Li[Li0.2Mn0.54Ni0.13Co0.13]O2 Cathode Material for Lithium Ion Battery” Electrochimica Acta, 85, 411-422, 2012.
  11. 11.S. Cronje, RE. Kroon, J. Neethling and WD Roos. “Twinning in copper deformed at high strain rates”. Bull. Mater. Sci., Vol. 36, No. 1, pp. 157–162, 2013.
  12. CJ Jafta, WD Roos and JJ Terblans. “Modification to an Auger Electron Spectroscopy system for measuring segregation in a bi-crystal, Journal of Instrumentation, 8, P03020 March 2013,
  13. Ozoemena, Kenneth; Jafta, Charl; Mathe, Mkhulu; Manyala, Ncholu; Roos, Wiets: "Microwave-Assisted Synthesis of High-Voltage Nanostructured LiMn1.5Ni0.5O4 spinel: Tuning the Mn3+ Content and Electrochemical Performance" : American Chemical Society: Appl. Mater. Interfaces 2013, 5, 7592-7598.
  14. Cronje S, WD Roos, RE Kroon en JKO Asante. “Die invloed van verdamping op die segregasieproses”. Suid Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 32(1) Art #407, 2013.


Area(s) of Interest

Surface Physics, specializes in the following Surface techniques:

Auger electron spectroscopy, X-ray photo electron spectroscopy, ion scattering spectroscopy

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FACULTY CONTACT

Faculty Manager: Velaphi Makgwahla
T: + 27 51 401 3199
E: makgwahlamvt@ufs.ac.za

Marketing Manager: Elfrieda Lötter
T: +27 51 401 2531
E: lottere@ufs.ac.za

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