1. Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3. France-China Bio-Mineralization and Nano-Structures Laboratory, Beijing 100193, China
4. Laboratoire de Chimie Bactérienne, UPR9043, Université de la Méditerranée, Institut de Microbiologie de la Méditerranée, CNRS, F-13402 Marseille Cedex 20, France