1. School of Pharmacy; International Medical University; No. 126, Jalan Jalil Perkasa 19, Bukit Jalil Kuala Lumpur 57000 Malaysia
2. Colloids and Interface Science Centre (CISC); Centre of Excellence (COE) RRIM Sungai Buloh Research Station Malaysian Rubber Board (MRB); Sungai Buloh Selangor 47000 Malaysia
3. Department of Chemistry Faculty of Science; University of Malaya; Lembah Pantai Kuala Lumpur 50603 Malaysia
4. School of Health Sciences; International Medical University; No. 126, Jalan Jalil Perkasa 19, Bukit Jalil Kuala Lumpur 57000 Malaysia