1. Flow Process and Rheology Centre; Cape Peninsula University of Technology; Cape Town- 8000 South Africa
2. Department of Chemical Engineering; Cape Peninsula University of Technology; Cape Town- 8000 South Africa
3. Electron Microscope Unit; University of the Western Cape; Bellville- 7535 South Africa
4. Energy Materials, Materials Science and Manufacturing; Council for Scientific and Industrial Research (CSIR); Pretoria- 0001 R.S.A