1. Australian Institute
for Innovative Materials (AIIM), Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
2. Electron Microscopy Centre (EMC), Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
3. Department of Engineering and Mathematics, Sheffield Hallam University, City Campus, Sheffield S1 1WB, United Kingdom