1. School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
2. Australian Centre for Nanomedicine, The University of New South Wales, Sydney, New South Wales 2052, Australia
3. The Virology Research Laboratory, The University of New South Wales, The Prince of Wales Hospital, Sydney, New South Wales 2052, Australia
4. Electron Microscope Unit, Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, New South Wales 2052, Australia