1. Institute for Nanoscience & Engineering, University of Arkansas, Fayetteville, AR 72701, USA
2. Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA
3. Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
4. Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
5. Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR
6. Department of Chemistry, University of Arkansas, Little Rock, AR 72204, USA
7. Department of Electrical Engineering, Pohang University of Science & Technology, Pohang 37673, Korea
8. Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA