1College of Textile, North Carolina State University, Raleigh, NC 27695;
2Department of Materials Science and Engineering, North Carolina State University Raleigh, NC 27695
3Department of Chemistry, Duke University, Durham, NC 27708;
4Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States
5Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695;
6Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708;
7Department of Physics, North Carolina State University, Raleigh NC 27695