1. Institute of NanoEngineering Research (INER) Department of Chemical, Metallurgical and Materials Engineering Faculty of Engineering and the Built Environment Tshwane University of Technology Pretoria South Africa
2. French South African Institute of Technology (F’SATI)/Department of Electrical Engineering Tshwane University of Technology Pretoria South Africa
3. École Supérieure d’Ingénieurs en Électrotechnique et Électronique Paris France
4. Centre for Nanostructures and Advanced Materials DSI‐CSIR Nanotechnology Innovation Centre Council for Scientific and Industrial Research CSIR Pretoria South Africa
5. Department of Chemical Sciences University of Johannesburg Johannesburg South Africa