1. Molecular and Nanoelectronics Research Group (MNRG), Department of Electrical Engineering, IIT Indore; Indore 453552 India
2. Department of Physics, Nano Functional Materials Technology Centre, Indian Institute of Technology Madras; Chennai 600036 India
3. Mechatronics and Instrumentation Lab, Department of Mechanical Engineering, IIT Indore; Indore 453552 India