Acknowledgements
The authors would like to acknowledge the Macquarie University Faculty
of Science and Engineering Microscope Facility (MQFoSEMF) for access to
its instrumentation and staff. This work was supported by the Australian
Research Council (ARC) through the Centre of Excellence for Nanoscale
BioPhotonics (CE140100003). H. Liu and K. Peng are supported by
International Macquarie University Research Excellence Scholarships
(iMQRES) for graduate study.