1. Laboratory of Materials Science and Nanotechnology Via Vienna 2 Department of Chemistry and Pharmacy, University of Sassari Sassari 07100 Italy
2. Laboratory of Materials Science and Nanotechnology Viale San Pietro 43/B CR‐INSTM Department of Biomedical Sciences University of Sassari Sassari 07100 Italy
3. NMR e Tecnologie Bioanalitiche Sardegna Ricerche Parco Scientifico e Tecnologico della Sardegna Pula CA 09010 Italy