1. Department of Materials and London Centre for Nanotechnology, Imperial College, Exhibition Road, LondonSW7 2AZ, UK
2. Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen2200N, Denmark
3. Comparative Paediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen2200N, Denmark
4. Centre for Ultrastructural Imaging, Kings College London, LondonSE1 1UL, UK
5. Department of Chemistry, University College London, 20 Gordon Street, LondonWC1H 0AJ, UK
6. The Francis Crick Institute, LondonNW11 AT, UK
7. Imperial College, Exhibition Road, LondonSW7 2AZ, UK
8. Centre for Neuroinflammation and Neurodegeneration, Imperial College London, Hammersmith Hospital Campus, Burlington Danes Building, 160 Du Cane Road, LondonW12 0NN, UK
9. Experimental Solid State Physics Group, Department of Physics, Imperial College, Exhibition Road, LondonSW72AZ, UK