CAS Key Laboratory of Standardization and Measurement for Nanotechnology;
CAS Center for Excellence in Nanoscience;
National Center for Nanoscience and Technology;
Beijing 100190;
China;
Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices;
Renmin University of China;
Beijing 100872;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
advanced; AFM; techniques; nanoscale; characteTization; electrical; properties; 2D; materials;