About the Authors
- Ahmad F. Ahmad
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* E-mail: suzan_ye@yahoo.com (SJO); ahmad_al67@yahoo.com (AFA)
Affiliation Institute for Mathematical Research, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
- Zulkifly Abbas
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Affiliations Institute for Mathematical Research, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia, Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
- Suzan J. Obaiys
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* E-mail: suzan_ye@yahoo.com (SJO); ahmad_al67@yahoo.com (AFA)
Affiliation Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
- Norazowa Ibrahim
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Affiliation Chemistry Department, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
- Mansor Hashim
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Affiliation Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
- Haider Khaleel
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Affiliation Department of Engineering Science, Sonoma State University, Rohnert Park, California, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: AFA ZA SJO. Performed the experiments: AFA ZA SJO NI. Analyzed the data: AFA SJO. Contributed reagents/materials/analysis tools: AFA SJO ZA NI MH. Wrote the paper: SJO AFA HK.