1. Center for Materials Science and Technology, University of Mysore, Vijana Bhavana, Manasagangothiri, Mysuru 570 006, India
2. Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar
3. Physics Department and Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
4. Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, JSS Science & Technology University, Mysuru 570 006, India
5. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China