1. Stephenson Institute for Renewable Energy and Department of Physics; School of Physical Sciences; University of Liverpool; Liverpool L69 7ZF UK
2. Department of Physics; University at Buffalo; Buffalo NY 14260 USA
3. Department of Physics; Applied Physics and Astronomy; Binghamton University; Binghamton NY 13902 USA
4. Kathleen Lonsdale Materials Chemistry; Department of Chemistry; University College London; London WC1H 0AJ UK
5. Diamond Light Source Ltd.; Diamond House; Harwell Science and Innovation Campus; Didcot Oxfordshire OX11 0DE UK
6. Department of Electrical and Computer Engineering; Western Michigan University; Kalamazoo MI 49008 USA