Control of Marine Bacteria and Diatom Biofouling by Constant and Alternating Potentials
| Autor: | Jana Schwarze, Wolfgang Schuhmann, Axel Rosenhahn |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Working electrode
Biofouling Cobetia marina Artificial seawater 02 engineering and technology 010402 general chemistry 01 natural sciences Marine bacteriophage Electrochemistry General Materials Science Spectroscopy Diatoms Double layer (biology) Bacteria biology Chemistry Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification 0104 chemical sciences Halomonadaceae Chemical engineering Biofilms Electrode Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Langmuir. 37:7464-7472 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | 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 Cobetia marina and the marine diatom Navicula perminuta. 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. |
| Databáze: | OpenAIRE |
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