1. Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials and Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University Suzhou Jiangsu 215123 P. R. China
2. Department of Physics University of Siegen 57072 Siegen Germany
3. Macao Institute of Materials Science and Engineering Macau University of Science and Technology Taipa Macau SAR 999078 P. R. China