1. Nanomaterials Research Group, Physics Division, PINSTECH, Islamabad 44000, Pakistan
2. Central Analytical Facility Division, PINSTECH, Islamabad 44000, Pakistan
3. Polymer Composite Group, Physics Division, PINSTECH, Islamabad 44000, Pakistan
4. Central Diagnostic Laboratory, Physics Division, PINSTECH, Islamabad 44000, Pakistan
5. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, P.R China