Acknowledgement
This study was supported by AOSpine Asia Pacific Research Grant 2019
(AOSAUNZ(R) 2019-05). The first author wishes to acknowledge the
University of Adelaide for awarding Adelaide Scholarship International
(ASI) for her PhD study. The authors also appreciate the support from
the Australian Research Council Research Hub for Graphene Enabled
Industry Transformation (project no. IH 150100003). Also, special thanks
go to Mr Arash Mazinani for his support with SEM imaging.