1. Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 P. R. China
2. Department of Materials Science and Engineering University of California Los Angeles CA 90095 USA
3. Department of Chemistry and Biochemistry University of California Los Angeles CA 90095 USA
4. Department of Engineering Technology University of Houston Houston TX 77204 USA
5. Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
6. State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
7. Department of Chemical Engineering Tsinghua University Beijing 100082 P. R. China