1. Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
2. Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
3. Jyoti and Bhupat Mehta School of Health Science and Technology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India