1. Centre for Medical Radiation Physics, University of Wollongong, Wollongong, New South Wales 2500, Australia
2. ARC Centre of Excellence for Electromaterials Science (ACES), Intelligent Polymer Research Institute (IPRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
3. School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
4. Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, New South Wales 2500, Australia
5. Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales 2522, Australia
6. Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, U.K.
7. Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, New South Wales 2234, Australia
8. School of Aeronautical, Mechanical and Mechatronic Engineering, University of Sydney, Camperdown, New South Wales 2006, Australia