1. Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, 50603 Kuala Lumpur, Malaysia
2. Publication Unit, Information Technology and Corporate Services Division, Malaysian Palm Oil Board (MPOB), 43000 Kajang, Selangor, Malaysia
3. Centre of Advanced Materials, Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia