1. Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur 208016, India
2. Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
3. Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
4. Thematic Unit of Excellence on Soft Nanofabrication, Indian Institute of Technology Kanpur, Kanpur 208016, India