About the Authors

Seyedeh Maryam Banihashemian

banihashemian_physics@yahoo.com

Affiliation Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia

Vengadesh Periasamy

Affiliation Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia

Goh Boon Tong

Affiliation Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia

Saadah Abdul Rahman

Affiliation Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SMB SAR VP GBT. Performed the experiments: SMB. Analyzed the data: SMB SAR VP GBT. Contributed reagents/materials/analysis tools: SMB. Wrote the paper: SMB SAR VP GBT.