1. Nanotechnology and Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. University of Malaya Centre for Ionic Liquids, University of Malaya, Kuala Lumpur 50603, Malaysia
3. National Chair of Materials Science and Metallurgy, University of Nizwz, Sultanate of Oman, Nizwa, Oman
4. Civil Engineering Department, Faculty of Engineering, Komar University of Science and Technology, Sulaymaniyah, Iraq
5. Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia