Abstract The anode surface is known to play an important role in the microbial growth and in mediating electron transfer between electroactive bacteria and the electrodes in power generating microbial fuel cells (MFCs). However, the effect of the anode surface and its modification on MFC-based biosensor performance has not been studied previously. In this study, our results show that the surface modification influences certain aspect of the biosensor performance. Plasma treatment makes the carbon cloth electrode hydrophilic with contact angle of 82 ± 5° from that of 139 ± 3° without treatment which consequently increases the amount of biofilm and produces higher current generation. Carbon nanotube (CNT) treatment doesn’t increase the amount of biofilm but significantly changes its electroactive microorganism composition from 2.3% to 17.3% that improves current generation. Interestingly, the sensitivity of the MFC sensor was not improved by either of these treatments. These findings would be important for the optimized design and manufacturing of biosensing MFCs.

中文翻译：

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阳极表面改性调节生物膜群落数量和基于微 MFC 的生化需氧量传感器的性能

摘要 众所周知，阳极表面在微生物生长和介导电活性细菌与发电微生物燃料电池 (MFC) 电极之间的电子转移中起着重要作用。然而，阳极表面及其修饰对基于 MFC 的生物传感器性能的影响之前尚未研究过。在这项研究中，我们的结果表明表面改性会影响生物传感器性能的某些方面。等离子体处理使碳布电极亲水，接触角为 82±5°，而未经处理的接触角为 139±3°，从而增加了生物膜的数量并产生更高的电流。碳纳米管 (CNT) 处理不会增加生物膜的数量，但将其电活性微生物组成从 2.3% 显着改变到 17%。3% 提高了当前的发电量。有趣的是，这些处理中的任何一种都没有提高 MFC 传感器的灵敏度。这些发现对于生物传感 MFC 的优化设计和制造非常重要。