1. Department of Chemistry, Loughborough University, Loughborough LE11 3TU, U.K.
2. Department of Mathematical Sciences, Loughborough University, Loughborough LE11 3TU, U.K.
3. Interdisciplinary Centre for Mathematical Modelling, Loughborough University, Loughborough LE11 3TU, U.K.
4. School of Design and Creative Arts, Loughborough University, Loughborough LE11 3TU, U.K.
5. Centre for Renewable and Low Carbon Energy, Cranfield University, Cranfield, Bedfordshire MK43 0AL, U.K.