1. Nanotechnology Research Centre (NRC), SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
2. Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India
3. 2D Materials and Devices Laboratory (2DML), Sir C. V. Raman Research Park, Department of Physics and Nanotechnology, SRM Institute of Science and Technology (SRMIST), Kattankulathur 603203, Chennai, India