1. Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology The University of Queensland St Lucia Queensland 4072 Australia
2. School of Chemistry and Molecular Biosciences Faculty of Science The University of Queensland St Lucia Queensland 4072 Australia
3. International Academy of Optoelectronics at Zhaoqing South China Normal University Zhaoqing Guangdong 526238 P. R. China
4. ARC Centre of Excellence in Exciton Science School of Chemistry University of Melbourne Parkville Victoria 3010 Australia
5. School of Chemical Engineering The University of Queensland St Lucia Queensland 4072 Australia