1. Institute for Microelectronics and Microsystems, CNR-IMM, Via Monteroni, 73100 Lecce, Italy
2. Biophysics and Nanoscience Centre, DEB, Università degli Studi della Tuscia, Largo dell’Università, 01100 Viterbo, Italy
3. Institute of Research on Terrestrial Ecosystems, CNR-IRET, Via Marconi 2, 05010 Porano, Italy