1. Center of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee India
2. Department of Electronics and Communication Engineering, Sharda University, Greater Noida India
3. Chemistry Department, University of Texas at El Paso, El Paso, TX U.S.A
4. Department of Metallurgical and Engineering, Indian Institute of Technology Roorkee, Roorkee India
5. In Vitro Toxicology Laboratory, Indian Institute of Toxicology Research, Lucknow, India
6. Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee India