1. Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
2. Thomas Young Centre, University College London, Gower Street, London WC1E 6BT, U.K.
3. Materials Research Centre, Chemistry Department, University College London, London WC1H 0AJ, U.K.
4. Bio Nano Consulting, 85 Tottenham Court Road, London W1T 4TQ, U.K.
5. Diamond Light Source Ltd., Diamond House, Harwell
Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K.