1. Department of Physics, King’s College London, Strand, London WC2R 2LS, U.K., School of Biomedical and Health Sciences, Waterloo Campus, King’s College London, Franklin-Wilkins Building, Stamford Street, London SE1 9NH, U.K., Division of Imaging Sciences, King’s College London, St. Thomas’ Hospital, London SE1 7EH, U.K., Centre for Ultrastructural Imaging, King’s College London, New Hunt’s House, Guy’s Campus, London SE1 1UL, U.K., and London Centre for Nanotechnology, University College London, 17-19...