1. BioNano Engineering Group, Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive CB3 0AS, Cambridge, UK
2. Hitachi Cambridge Laboratory, Hitachi Europe Ltd, J. J. Thomson Avenue, Cambridge CB3 0HE, UK
3. Karlsruhe Institute of Technology (KIT), Institute for Biological Interfaces (IBG 1), Hermann-von-Helmholtz-Platz, D-76344 Eggenstein-Leopoldshafen, Germany