**Acknowledgements**

This work was supported in part by the National Research Foundation's Rated Researcher Incentive Funding (IFR2011033100025 Grant), Key International Collaboration Grant (KIC 69798), and the Department of Higher Education and Training (DHET) Grant, administered by the Tshwane University of Technology, South Africa. The iNanoWS Laboratory at UNISA, South Africa, is specially

thanked for supporting the experimental analyses and facilitating the nanomaterials analysis and characterization work as presented in this chapter.
