1. Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane 4111, Australia
2. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, Punjab 63100, Pakistan
3. Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane 4072, Australia
4. Centre for Advanced Imaging, University of Queensland, Brisbane 4072, Australia
5. School of Environment and Science, Griffith University, Brisbane 4111, Australia