1. Nanoscience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, Florida 32826, USA
2. Department of Physics, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, Florida 32826, USA
3. School of Electrical Engineering and Computer Science, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, Florida 32826, USA