1. CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‐Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 P. R. China
2. College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P. R. China
3. Sinoma Synthetic Crystals Co Ltd Beijing 100018 P. R. China
4. Center on Nanoenergy Research School of Physical Science and Technology Guangxi University Nanning Guangxi 530004 P. R. China
5. Department of Civil Engineering Monash University Clayton 3800 Australia