1. Centre
for Nanotechnology, 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. Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India