1. Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, P. R. China.
2. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China.
3. Laboratory of Theoretical and Computational Nanoscience, Chinese Academy of Sciences (CAS) Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, P. R. China.
4. University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P. R. China.