1. School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
2. Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, United States
3. School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
4. Department of Electrical and Computer Engineering and Petersen Institute of Nano Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States