1. Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia
2. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
3. School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
4. Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd., Cambridge CB3 OFS, United Kingdom