1. Chemical Technology Laboratory, Department of Chemistry, University of Patras, GR-26500 Patras, Greece
2. Department of Physics, Government Engineering College for Women, Ajmer, Rajasthan, India
3. Physics Department, Molecular Electronic and Optoelectronic Device Laboratory, JNV University, Jodhpur (Raj.) 342005, India
4. R& D Center for Science and Engineering, Jaipur Engineering College, Kukas, Jaipur (Raj.), India