1. Vishwavidyalaya Engineering College,Department of Basic Science,Ambikapur, CSVTU-Bhilai,Chhatisgarh,India,497001,
2. King Abdullah University of Science and Technology (KAUST),Advanced Membranes and Porous Materials Center, Bldg. 4. Level 3, Office 3266-WS10,Thuwal,Saudi Arabia,23955,
3. National University of Singapore,Department of Physics,3 Science Drive 3,Singapore,117543,