**Author details**

Shah Bakhtiar Nasir1 , Jia Ti Tee<sup>1</sup> , Noorsaadah Abd Rahman<sup>1</sup> and Chin Fei Chee<sup>2</sup> \*

\*Address all correspondence to: cheechinfei@um.edu.my

1 Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia

2 Nanotechnology and Catalysis Research Centre, University of Malaya, Kuala Lumpur, Malaysia
