1. Department of Chemical Engineering, Fu Foundation School of Engineering and Applied Science, Columbia University, New York, New York 10027, United States
2. Department of Applied Physics and Applied Mathematics, Fu Foundation School of Engineering and Applied Science, Columbia University, New York, New York 10027, United States
3. Center for Functional Nanomaterials, Energy & Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States