1. School of Chemistry and Electron Microscopy Unit; of the Mark Wainwright Analytical Centre; University of New South Wales; Sydney NSW 2052 Australia
2. Leather&Shoe Research Association of New Zealand; and the MacDiarmid Institute for Advanced Materials and Nanotechnology; Palmerston North 4446 New Zealand
3. Australian Centre for Nanomedicine; University of New South Wales; Sydney NSW 2052 Australia