1. Biomedical Instrumentation Section, Materials Physics & Engineering Division, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
2. Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram, Hyderabad, Andhra Pradesh 502205, India
3. Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi 110067, India
4. Department of Biotechnology, Delhi Technological University, Main Bawana Road, Delhi 110042, India