1. Department of Science & Technology Centre on Biomolecular Electronics, Biomedical Instrumentation Section, Materials Physics & Engineering Division, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi-110012, India
2. Department of Chemistry, University of Delhi, Delhi-110007, India
3. Division of Microbiology, Indian Agricultural Research Institute, New Delhi-110012, India
4. Department of Physical Electronics, Tokyo Institute of Technology, Tokyo, Japan