1. Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Chengalpattu District, Kattankulathur 603203, Tamil Nadu, India
2. Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Chengalpattu District, Kattankulathur 603203, Tamil Nadu, India