1. Centre for Life Sciences, Vidyasagar University, Midnapore 721102, West Bengal, India
2. Department of Chemistry, Vidyasagar University, Midnapore 721102, West Bengal, India
3. Chemistry of Interfaces Group, Luleå University of Technology, SE-97187 Luleå, Sweden
4. Department of Human Physiology, Vidyasagar University, Midnapore 721102, West Bengal, India
5. Solid State Physics Division, Bhaba Atomic Research Centre, Mumbai 400085, India
6. Department of Applied Chemistry,Graduate School of Engineering, University of Hyogo, Himeji, Hyogo 671-2280, Japan