1. School of Materials Science and Engineering University of New South Wales (UNSW) Sydney NSW 2052 Australia
2. Global Innovative Centre for Advanced Nanomaterials School of Engineering, College of Engineering, Science and Environment The University of Newcastle Callaghan NSW 2308 Australia
3. State Key Laboratory of Luminescence and Applications (SKLLA) Changchun Institute of Optics Fine Mechanics and Physics (CIOMP) Chinese Academy of Science (CAS) Changchun City 130033 China