Analytical Chemistry - Faculty of Chemistry and Biochemistry, Biointerfaces, Ruhr University Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany.
Analytical Chemistry - Center for Electroanalytical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany.
Langmuir. 2021 Jun 22;37(24):7464-7472. doi: 10.1021/acs.langmuir.1c00865. Epub 2021 Jun 8.
The application of electrochemical potentials to surfaces is an easy and direct way to alter surface charge density, the structure of the electrochemical double layer, and the presence of electrochemically activated species. On such electrified interfaces the formation of biofilms is reduced. Here we investigate how applied potentials alter the colonization of surfaces by the marine bacterium and the marine diatom . Different constant potentials between -0.8 and 0.6 V as well as regular switching between two potentials were investigated, and their influence on the attachment of the two biofilm-forming microorganisms on gold-coated working electrodes was quantified. Reduced bacteria and diatom attachment were found when negative potentials and alternating potentials were applied. The results are discussed on the basis of the electrochemical processes occurring at the working electrode in artificial seawater as revealed by cyclic voltammetry.
电化学势在表面的应用是改变表面电荷密度、电化学双层结构和电化学活性物质存在的一种简单直接的方法。在这种带电界面上，生物膜的形成会减少。在这里，我们研究了外加电位如何改变海洋细菌 和海洋硅藻 的表面定殖。研究了不同的恒定电位在-0.8 和 0.6 V 之间以及两个电位之间的定期切换，以及它们对两种形成生物膜的微生物在镀金工作电极上附着的影响。当施加负电位和交替电位时，发现细菌和硅藻的附着减少。根据循环伏安法揭示的在人工海水中工作电极上发生的电化学过程对结果进行了讨论。
