1. Department of Mechanical Engineering & School of Biomedical Engineering & Sciences, Virginia Tech, VA 24061, USA; ICTAS 410 ICTAS, Stanger Street (MC 0193) Blacksburg, VA 24061, USA.
2. Department of Industrial Systems & Engineering, Virginia Tech, VA 24061, USA
3. Department of Mechanical Engineering & School of Biomedical Engineering & Sciences, Virginia Tech, VA 24061, USA; ICTAS 410 ICTAS, Stanger Street (MC 0193) Blacksburg, VA 24061, USA
4. Department of Biological Systems Engineering, Virginia Tech, VA 24061, USA
5. Molecular Microbial & Structural Biology, University of Connecticut, Farmington, CT 06030, USA
6. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6488 USA