1. Department of Chemistry; Universiti Putra Malaysia; Serdang Selangor 43400 Malaysia
2. Department of Physics, Faculty of Science; Universiti Putra Malaysia; Serdang Selangor 43400 Malaysia
3. Department of Chemical and Environmental Engineering, Faculty of Engineering; Universiti Putra Malaysia; Serdang Selangor 43300 Malaysia
4. Materials Processing and Technology Laboratory; Institute of Advanced Technology, Universiti Putra Malaysia; UPM Serdang Selangor 43400 Malaysia
5. Materials Synthesis and Characterization Laboratory; Institute of Advanced Technology, Universiti Putra Malaysia; UPM Serdang Selangor 43400 Malaysia
6. Functional Devices Laboratory; Institute of Advanced Technology, Universiti Putra Malaysia; UPM Serdang Selangor 43400 Malaysia