1. Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy
2. Dipartimento di Chimica e Chimica Industriale, Università di Genova, via Dodecaneso 31, 16146 Genova, Italy
3. Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K.
4. Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
5. Technical University of Munich, Department of Electrical and Computer Engineering Munchen, Bayern, DE 80333, Germany
6. Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, 16146 Genova, Italy
7. Center for Cooperative Research in Biomaterials (CICbiomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain
8. Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
9. Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0, 28029 Madrid, Spain
10. Second Physics Institute, University of Stuttgart, 70569 Stuttgart, Germany
11. Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany