1. Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
2. Processes, Materials and Solar Energy laboratory, CNRS-PROMES, 7 Rue du Four Solaire, F-66120 Font Romeu Odeillo, France
3. Discipline of Electrical Engineering, Energy and Physics, School of Engineering and Information Technology, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia