1. Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia (UTM), Kuala Lumpur, Malaysia;
2. Graphene & Advanced 2D Materials Research Group (GAMRG), School of Science and Technology, Sunway University, Subang Jaya, Selangor, Malaysia;
3. Faculty of Engineering and Science, Department of Chemical Engineering, Curtin University, Sarawak, Malaysia