1. Department of Electrical and Computer Engineering George Washington University 800 22nd Street, NW Washington DC 20052 USA
2. Centre for Advanced Materials Processing CSIR-Central Mechanical Engineering Research Institute Durgapur- 713209 India
3. Department of Science School of Technology Pandit Deendayal Petroleum University Raisan, Gandhinagar Gujarat 382077 India
4. U.S. Army Research Laboratory Sensors and Electron Devices Directorate 2800 Powder Mill Road Adelphi MD 20783 USA
5. Department of Physics Lehigh University 16 Memorial Dr East PA 18015 USA