1. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Campus de la Universitat Autònoma de Barcelona, Bellaterra E-08193 Barcelona, Spain
2. Institut für Allgemeine Anorganische und Theoretische Chemie, Universität Innsbruck, A-6020, Innrain 52a, Innsbruck, Austria
3. Serveis Tecnics de Recerca. Universitat de Girona. Edifici Jaume Casademont (porta E), Pic de Peguera, 15 (La Creueta), E- 17003 Girona, Spain
4. Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, B-7000 Mons, Belgium