1. Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
2. Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
3. NanoCenter, University of South Carolina, Columbia, South Carolina 29208, United States
4. Department
of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States