1. FEMTO-ST Institute, AS2M Department, UMR CNRS 6174-UFC/ENSMM/UTBM, 24 rue Alain Savary, 25000 Besançon, France
2. Institut Européen des Membranes de Montpellier (IEMM, UMR CNRS 5635, ENSCM), Place Eugène Bataillon, 34095 MONTPELLIER Cedex 5, France
3. EMPA, Materials Science & Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland