1. Centre for Nano and Soft Matter Sciences, Shivanapura, Bengaluru 562162, India
2. Manipal Academy of Higher Education, Manipal 576104, India
3. School of Electrical and Electronic Engineering, SASTRA Deemed to be University, Thanjavur 613401, Tamil Nadu, India
4. Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru 560064, India