1. Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
2. Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
3. Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia