1. School of Chemical Engineering University of New South Wales (UNSW) Sydney NSW 2052 Australia
2. Evolution and Optics of Nanostructures Group Department of Biology University of Ghent K. L. Ledeganckstraat 35 Ghent 9000 Belgium
3. Electron Microscope Unit Mark Wainwright Analytical Centre University of New South Wales (UNSW) Sydney NSW 2052 Australia
4. School of Chemistry University of New South Wales (UNSW) Sydney NSW 2052 Australia
5. ARC Centre of Excellence for Nanoscale BioPhotonics Graduate School of Biomedical Engineering University of New South Wales (UNSW) Sydney NSW 2052 Australia
6. Graduate School of Biomedical Engineering University of New South Wales (UNSW) Sydney NSW 2052 Australia
7. School of Chemical and Biomolecular Engineering The University of Sydney Sydney NSW 2006 Australia