1. Center for Layered Polymeric Systems, Department of Macromolecular Science and Engineering; Case Western Reserve University; Cleveland Ohio 44106-7202
2. LEPMI, UMR 5279, CNRS, Grenoble INP, Université de Savoie; Université J. Fourier, LMOPS, Bât. IUT, Campus de Savoie Technolac; F-73376 Le Bourget du Lac Cédex France