1. School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K.
2. Department of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
3. Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0QX, U.K.
4. School of Physics, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K.
5. Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K.