[1] Riphah Int Univ, Dept Phys, Campus Lahore, Lahore, Pakistan
[2] Sejong Univ, Dept Intelligent Mech Engn, Seoul, South Korea
[3] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, 209 Neungdong Ro, Seoul 05006, South Korea
[4] Sejong Univ, Dept Phys & Astron, 209 Neungdong Ro, Seoul 05006, South Korea
[5] Sejong Univ, Graphene Res Inst, 209 Neungdong Ro, Seoul 05006, South Korea