1. Advanced Research Laboratory for Nanomaterials and Devices, Department of Nanotechnology, Swarnandhra College of Engineering and Technology, Seetharampuram, Narsapur (A.P.), Pin-534280, India
2. School of Advanced Sciences, VIT University, Vellore, (T.N.), Pin-632014, India
3. Center for Advanced Studies in Materials Science and Condensed Matter Physics, Department of Physics, University of Pune, (M.S.), Pin-411007, India
4. Department of Electronics, North Maharashtra University, Post Box 80, Umavinagar, Jalgaon (M.S.), Pin-425001, India