Olakanmi, E. O.
Sepako, M.
Morake, J.
Hoosain, S. E.
Pityana, S. L.
Funding for this research was provided by:
African Laser Centre, Council for Scientific and Industrial Research (. CSIR-NLC Reference LHIL 500 task ALC R008 & R010))
Botswana International University of Science and Technology (Grant no. BIUST/ds/r&I/7/2016)
Article History
Received: 1 October 2018
Accepted: 24 November 2018
First Online: 7 December 2018