1. School of Chemical Engineering, Engineering CampusUniversiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, S.P.S. Penang Malaysia
2. Department of Chemical Engineering Technology, Faculty of Engineering TechnologyUniversiti Malaysia Perlis, Kampus UniCITI Alam Sungai Chuchuh, Padang Besar 02100 Perlis Malaysia
3. Department of PhysicsCarnegie Mellon University Pittsburgh PA 15213
4. Department of Chemical EngineeringLee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman Jalan Sungai Long 9, Bandar Sungai Long 43000 Kajang, Selangor Malaysia