About the Authors

Naif Mohammed Al-Hada

naifalhada@yahoo.com

Affiliation Department of Physics, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia

Elias B. Saion

Affiliation Department of Physics, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia

Abdul Halim Shaari

Affiliation Department of Physics, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia

Mazliana A. Kamarudin

Affiliation Department of Physics, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia

Moayad Husein Flaifel

Affiliation School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia

Sahrim Hj Ahmad

Affiliation School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia

Salahudeen A. Gene

Affiliation Department of Physics, Faculty of Science, University Putra Malaysia, Serdang, Selangor, Malaysia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NMA ES AHS MAK. Performed the experiments: NMA MHF. Analyzed the data: NMA ES MHF SHA. Contributed reagents/materials/analysis tools: NMA ES MAK MHF SHA SAG. Contributed to the writing of the manuscript: NMA ES AHS MHF SAG.