| Affiliation: | 1. Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, China;2. School of Instrumentation Science and Opto‐electronics Engineering, Beihang University, Beijing, China;3. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA;4. Department of Chemistry, Department of Physics and Center for 2‐Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, USA;5. Institute of Carbon Science and Technology, Shinshu University, Nagano, Japan |
