1. Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
2. Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
3. Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India