1. Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
2. Berkeley Sensor & Actuator Center, University of California, Berkeley, Berkeley, California 94720, United States
3. State Key Laboratory of Digital Manufacturing
Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
4. Department
of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
5. Department of Physics, University of California, Berkeley, Berkeley, California 94720, United States
6. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Kavli Energy NanoSciences Institute at the University of California, Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States