Impedimetric characterization of the changes produced in the electrode–solution interface by bacterial attachment |
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| Institution: | 1. Centre Nacional de Microelectrònica (IMB-CSIC), Esfera UAB, Campus Univ., Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain;2. Grup de Microbiologia Ambiental, Universitat Autònoma de Barcelona, Campus UAB, E-08193 Bellaterra, Spain;3. Department of Chemistry, University of Bath, Bath BA27AY, United Kingdom;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China;2. Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China;1. “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Spl. Independentei 202, 060021 Bucharest, Romania;2. Department of Microbiology, Faculty of Biology, University of Bucharest, Research Institute of University of Bucharest, Ale. Portocalilor 1-3, 60101 Bucharest, Romania;3. National Institute for Lasers, Plasma and Radiation Physics, Atomistilor 409, PO-Box MG-36, 077125 Magurele, Romania;1. Department of Nano-Bio Energy, Chung-Ang University, Seoul 156-756, Republic of Korea;2. School of Integrative Engineering, Chung-Ang University, Seoul 156-756, Republic of Korea;1. Electrochemistry, DECHEMA Forschungsinstitut, Theodor Heuss Allee 25, 60486 Frankfurt a. M. Germany;2. Chair of Bioprocess Engineering, University of Kaiserslautern, Gottlieb-Daimler-Str. 49, 67663 Kaiserslautern, Germany;3. Biochemical Engineering, DECHEMA Forschungsinstitut, Theodor Heuss Allee 25, 60486 Frankfurt a. M. Germany;1. Departament de Microbiologia, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal 643, 08028 Barcelona, Spain;2. Laboratori d’Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain;1. Institute of Electrochemistry and Energy Systems “Acad. E. Budevski” – Bulgarian Academy of Sciences, Sofia, Bulgaria;2. Plovdiv University “Paisii Hilendarski”, Plovdiv, Bulgaria;3. Innovative Center for Eco Energy Technologies, South-West University “Neofit Rilski”, Blagoevgrad, Bulgaria |
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| Abstract: | This paper describes a new method for measuring the attachment of bacteria, specifically Escherichia coli on platinum electrodes using impedance spectroscopy. Impedance spectroscopy measurements showed that the double layer capacitance of the electrode was very sensitive both to the concentration of bacteria in the solution and to the attachment time. Impedance measurements of E. coli were compared with classical measurements of bacterial attachment on identical electrodes such as staining/microscopy and bacterial removal by sonication and plating onto agar. The relationship between the measured impedance of the electrode during attachment and the biophysical processes involved is discussed. |
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