1. Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada
2. Istituto di Struttura della Materia-CNR (ISM-CNR), Via Fosso del Cavaliere 100, 00133 Roma, Italy
3. CNR-IOM, Laboratorio, TASC, S.S. 14 Km 163.5, Basovizza, 34149 Trieste, Italy
4. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, 130103 Changchun, P. R. China
5. Consiglio Nazionale delle Ricerche-Istituto Officina dei Materiali (CNR-IOM), C/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
6. Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, H3A 0B8 Québec, Canada
7. Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
8. Department of Physics, University Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy