1. Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua‐Berkeley Shenzhen Institute (TBSI) Tsinghua University Shenzhen 518055 China
2. Advanced Materials Institute Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China
3. Department of Physics and Astronomy California State University Northridge 18111 Nordhoff Street Northridge CA 91330‐8268 USA
4. Department of Chemistry and Biochemistry The Ohio State University 151 West Woodruff Avenue Columbus OH 43210 USA
5. Shenzhen Key Laboratory for Graphene‐Based Materials and Engineering Laboratory for Functionalized Carbon Materials Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China