ACKNOWLEDGEMENTS
The authors would like to acknowledge the financial support given by Ministry of Education Malaysia scholarship under program MyBrain 15 and Zamalah UKM.
The authors acknowledge Saiful Bahari Bakaruddin & Muhamad Hafiz Taib from Polymer Lab, School of Applied
Physic, Idris Sharif and Ahmad Zaki Zaini from Electron Microscopy Unit, Universiti Kebangsaan Malaysia for
their contribution in this work