1. Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78758 United States
2. Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 United States
3. NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
4. Department of Electrical and Computer Engineering, University of Central Florida, Orlando, Florida 32816, United States
5. Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32816, United States
6. Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78758 United States