Funding for this research was provided by:
Universiti Putra Malaysia (FRGS/1/2016/STG02/UPM/01/2)
Received: 9 April 2021
Accepted: 7 November 2021
First Online: 27 November 2021
: The study was approved by the Institute of Nanoscience and Nanotechnology (ION2) and Department of Physics, Faculty of Science, Universiti Putra Malaysia, and all procedures were carried out in accordance with guidelines set out by the committee.
: Not applicable.
: The authors declare no conflict of interest.