1. Consiglio Nazionale delle Ricerche, Istituto di Cristallografia, Sede Secondaria di Catania, Via Paolo Gaifami 18, 95126 Catania, Italy
2. Departments of Chemistry and Chemical Biology & Biochemistry and Biomedical Sciences, McMaster University, Hamilton ON L8S 4M1, Canada
3. Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, I-80126 Napoli, Italy
4. Institute for Microelectronics and Microsystems, National Research Council, Stradale Primosole 50, 95121 Catania, Italy
5. STMicroelectronics, Stradale Primosole 50, 95121 Catania, Italy