1. University of South Africa, Institute for Nanotechnology and Water Sustainability Research, Pretoria, South Africa
2. University of Johannesburg, Department of Electrical and Electronics Engineering Technology, Johannesburg, South Africa
3. Université Paris-Est, ESYCOM-CNRS, ESIEE Paris, Le Cnam, UPEM, Cite Descartes, Noi-sy-Le-Grand-Cedex, France
4. Université Gustave Eiffel, ESYCOM-CNRS, Le Cnam, Paris, France
5. Ben Gurion University of the Negev, Be’er Sheva, Israel