1. CNR-IMM, Via S. Sofia 64, 95123 Catania, Italy
2. Department of Metallurgy & Materials Engineering, Faculty of Engineering, University of Malta, Msida MSD 2080, Malta
3. Department of Industrial & Manufacturing Engineering, Faculty of Engineering, University of Malta, Msida MSD 2080, Malta
4. Plastica Alfa SpA, C. da Santa Maria Poggiarelli, Zona Industriale, 95041 Caltagirone (CT), Italy
5. CNR-IMM, Z.I. VIII Strada 5, 95121 Catania, Italy
6. Department of Biological, Geological and Environmental Science, University of Catania, Via Androne 81, 95124 Catania, Italy
7. Department of Chemical, Biological, Pharmacological and Environmental Science, University of Messina, Viale Ferdinando Stagno d’Alcontres 31, 98166 Messina, Italy