1. Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China
2. State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China
3. Hefei Public Security Bureau, Hefei, Anhui 230001, China
4. CNOOC Changzhou Paint & Coating Industry Research Institute Co. Ltd., Changzhou, Jiangsu 213016, China