1. Department of Physical Chemistry, University of Zaragoza, Calle Pedro Cerbuna, 12, 50009 Zaragoza, Spain
2. Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, UPV/EHU & Donostia International Physics Center (DIPC), PK 1072, 20080 Donostia-San Sebastián, Spain