1. Department of Chemical and Geological Sciences, University of Cagliari, SS 554 Bivio per Sestu, I09042 Monserrato, CA, Italy
2. Fabbrica Italiana Leghe Metalliche Sinterizzate (F.I.L.M.S.) SpA, Via Megolo 49, I28877 Anzola D’Ossola, VB, Italy
3. Department of Chemistry, L3—Luminescent Lanthanide Lab, Ghent University, Krijgslaan 281, Building S3, B-9000 Gent, Belgium
4. STIIMA-CNR, Istituto di Sistemi e Tecnologie Industriali per il Manifatturiero Avanzato, Via Corti 12, I20100, Milano, Italy
5. Department of Mechanical Engineering, Politecnico di Milano, Via la Masa 1, I20157 Milano, Italy
6. Department of Physics, University of Cagliari, SS 554 Bivio per Sestu, I09042 Monserrato, CA, Italy
7. Department of Civil and Environmental Engineering and Architecture (DICAAR) and INSTM Unit, Via Marengo 2, I09123 Cagliari, Italy