1. Department of Physical Chemistry of Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
2. National Institute for Electrical Engineering (INCDIE ICPE CA), 313 Splaiul Unirii, P.O. Box 149, 030138 Bucharest, Romania