1. Institute for Bioengineering of Catalonia (IBEC) The Barcelona Institute of Science and Technology Baldiri Reixac 10–12 08028 Barcelona Spain
2. Department of Material Science and Physical ChemistryUniversity of Barcelona 08028 Barcelona Catalonia Spain
3. Networking Research Center on BioengineeringBiomaterials and Nanomedicine (CIBER‐BBN) Poeta Mariano Esquillor s/n 50018 Zaragoza Spain
4. Dipartimento di Elettronica, Informazione e BioingegneriaPolitecnico di Milano Via Ponzio, 34/5 20133 Milan Italy
5. Institució Catalana de Recerca i Estudis Avançats (ICREA)Passeig Lluís Companys 23 08010 Barcelona Spain