1. Process and Environmental Research Division, Faculty of Engineering University of Nottingham University Park, Nottingham NG7 2RD UK
2. School of Chemistry University of Nottingham University Park, Nottingham NG7 2RD UK
3. Division of Materials, Mechanics and Structures, Faculty of Engineering University of Nottingham University Park, Nottingham NG7 2RD UK wim.thielemans@nottingham.ac.uk