* Corresponding authors

^a School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

^b CAS Key Laboratory of Nanophotonic Materials and Devices, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
E-mail: lizhenjun@nanoctr.cn, lichi@nanoctr.cn
Tel: +86 10 82545609

^c The GBA National Institute for Nanotechnology Innovation, Guangdong, Guangzhou 510700, China

^d School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China

^e Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China