Funding for this research was provided by:
Universiti Kebangsaan Malaysia (FRGS/1/2014/TK04/UKM/03/2, GGPM-2014-027)
Article History
Received: 5 September 2017
Accepted: 10 January 2018
First Online: 26 January 2018
Author Contributions
: M.M. performed the experimental works, analyzed the data, and wrote the manuscript, S. M. designed the experiment, and B.K.D. performed the technical check and modeling.
: The authors declare that they have no conflict of interest.