1. Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique - Université du Québec, Quebec, Canada
2. Department of Civil & Environmental Engineering, (DICA), The University of Perugia, Perugia, Italy
3. CNR-SCITEC, Perugia, Italy
4. Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, Taiwan
5. Center of Crystal Research, National Sun Yat-sen University, Kaohsiung, Taiwan
6. School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Japan