1. DST Unit of Nanoscience, Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology Madras, Chennai600036, India
2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai600036, India
3. International Centre for Clean Water, Second Floor, B-Block, IIT Madras Research Park, Kanagam Road, Taramani, Chennai600113, India