1. Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX 76011, USA
2. Nanotechnology Research and Teaching Facility, University of Texas at Arlington, Arlington, TX 76019, USA
3. Department of Biology, University of Texas at Arlington, Arlington, TX 76010, USA
4. Joint Graduate Committee of Bioengineering Program, University of Texas at Arlington, Arlington, TX 76010, USA
5. Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76010, USA