1. Department of Chemistry, University of the Free State (Qwaqwa Campus), Phuthaditjhaba, South Africa
2. Center for Advanced Materials, Qatar University, Doha, Qatar
3. Department of Biological, Chemical and Pharmaceutical Science and Technology - STEBICEF and INSTM UdR - Palermo, University of Palermo, Italy
4. Center of Large Equipment - ATeN Center, University of Palermo, Palermo, Italy