Institution: | 1. Laser Research Laboratory, Physics Department , King Fahd University of Petroleum &2. Minerals , Dhahran, Saudi Arabia;3. Center for Nano Technology, King Fahd University of Petroleum &4. Minerals , Dhahran, Saudi Arabia magondal@kfupm.edu.sa;6. Minerals , Dhahran, Saudi Arabia;7. Institute of Environmental Science &8. Engineering, National University of Sciences and Technology (NUST) , Rawalpindi, Pakistan;9. Civil Engineering Department , King Fahd University of Petroleum & |