Laboratory of Marine Corrosion and Protection, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China.
Bioelectrochemistry. 2010 Apr;78(1):92-5. doi: 10.1016/j.bioelechem.2009.09.010. Epub 2009 Oct 2.
It is known that electron transfer processes exist between microorganisms and electrodes. Many anaerobic bacteria, which can transfer electrons to solid electrodes, had been identified. However, little attention has been paid to the interactions between aerobic biofilms and electrodes. In this study, marine biofilms formation on graphite electrodes was characterized by open circuit potential and field emission scanning electron microscopy. Electron transfer between marine aerobic biofilms and graphite electrodes was investigated primarily by cyclic voltammograms and electrochemical impedance spectroscopy techniques. Herein, we suggest that marine biofilms are a kind of conductive biofilms that can transfer electrons to graphite electrodes under anaerobic and aerobic conditions. Some cytochrome species in bacterial biofilms may play a key role in the electron transfer process.
已知电子转移过程存在于微生物和电极之间。已经鉴定出许多可以将电子传递到固体电极的厌氧细菌。然而，人们对好氧生物膜与电极之间的相互作用关注甚少。在这项研究中，通过开路电位和场发射扫描电子显微镜来表征石墨电极上的海洋生物膜形成。通过循环伏安法和电化学阻抗谱技术初步研究了海洋好氧生物膜与石墨电极之间的电子转移。在此，我们认为海洋生物膜是一种导电生物膜，它可以在厌氧和好氧条件下将电子传递到石墨电极。细菌生物膜中的一些细胞色素物质可能在电子传递过程中起关键作用。
