Division of Advanced Nanomaterials Key Laboratory of Nanodevices and Applications Joint Key Laboratory of Functional Nanomaterials and Devices CAS Center for Excellence in Nanoscience Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 People's Republic of China;
School of Nano Technology and Nano Bionics University of Science and Technology of China Hefei 230026 People's Republic of China;
Division of Nanomaterials Suzhou Institute of Nano-Tech and Nano-Bionics Nanchang Chinese Academy of Sciences Nanchang 330200 People's Republic of China;
School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Jurong West 639798 Singapore;
National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 People's Republic of China;