1. Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia
2. Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia
3. PETRONAS Research Sdn. Bhd., Lot 3288 & 3299, Off Jalan Ayer Itam, 43000 Bangi, Selangor, Malaysia
4. Department of Chemistry, Universiti Teknologi Malaysia, Johor Bahru 81310 UTM, Malaysia