a
Department of Physics and Astronomy, The University of Sheffield, Sheffield, UK
E-mail: a.j.parnell@sheffield.ac.uk
;
Tel: +44 (0)114 22 23505
b
The Polymer Centre, Dainton Building, Sheffield, UK
c
Department of Chemistry, Dainton Building, The University of Sheffield, Sheffield, UK
E-mail: p.fairclough@sheffield.ac.uk
;
Tel: +44 (0)114 22 29411
d
Department of Chemical and Process Engineering, University of Sheffield, UK
e
Department of Physics, University of Hull, Cottingham Road, Hull, UK
f
Diamond Light Source, Oxfordshire, UK