1. Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, Tamil Nadu 613 401, India
2. School of Electrical & Electronics Engineering (SEEE), SASTRA Deemed University Thanjavur, Tamil Nadu 613 401, India
3. Department of Textile & Fibre Engineering, Indian Institute of Technology Delhi New Delhi, 110 016, India