Microbial Fuel Cell based on Electrode-Exoelectrogenic Bacteria Interface

Parra, Erika; Liu, Lin

doi:10.1109/memsys.2009.4805311

Cited by 17 publications

(14 citation statements)

References 7 publications

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“…The system consists of bacterium within their basal media that contains redox active species such as vitamins and organics. A potential difference between the anode and the cathode of 590 mV was obtained after 30 minutes without microorganisms, which is in agreement to our prior results [2,3]. Upon inoculation of the bacterium, a potential change of the anode was detected.…”

Section: Bacterium Redox Potentialsupporting

confidence: 92%

“…Previous studies have shown that 1.4 µA/mm 2 can be achieved from mature G. sulfurreducens biofilms [2]. However, to determine the signal on a per cell basis, where currents in the hundreds of fA per cell are projected [3,6], background signals and ambient noise must be quantified and minimized.…”

Section: Resultsmentioning

confidence: 99%

“…The oxide layer was then patterned through photolithography and etched using a CHF 3 /O 2 plasma to define the micro-electrodes. The device consisted of a 500×500 µm 2 opening through the oxide insulation layer with a total area of 0.25 mm 2 . The thin films on the cover slips were then annealed at 350ºC in air for 1 hr to provide a sheet resistance of 300 Ω/□ and greater than 85% transmissivity at wavelengths between 350-700 nm.…”

Section: A B E -mentioning

confidence: 99%

“…Previous works have demonstrated 0.12 µW/mm 2 from µMFCs, using the exoelectrogenic bacterium G. sulfurreducens [2][3][4][5]. However, the specific metabolic activity of microorganisms and their electron discharge characteristics from biofilms have been difficult to characterize.…”

Section: Introductionmentioning

confidence: 99%

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Real-time biocatalyst loading and electron transfer via microfabricated transparent electrode

Parra

Higa

Buie

et al. 2010

2010 IEEE 23rd International Conference on Micro Electro Mechanical Systems (MEMS)

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Real-time and simultaneous measurements of bacterial catalyst loading and electron transfer have been accomplished via a microfabricated transparent electrode within the setup of a micro-microbial fuel cell (µMFC). By characterizing the electron transfer on a per cell basis, we aim to generate a methodology for species-to-species comparison and formulate a baseline for electrode optimizations. This is critical and fundamental knowledge to be explored within the scope of MFCs as power devices with direct implications to molecular cell biology. Preliminary results are presented showing that, using Geobacter sulfurreducens, a signal to noise ratio (SNR) of 11 can be achieved upon inoculation and single cells can be non-invasively and accurately identified using intrinsic fluorescence.

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Section: Bacterium Redox Potentialsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: A B E -mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Real-time biocatalyst loading and electron transfer via microfabricated transparent electrode

Parra

Higa

Buie

et al. 2010

2010 IEEE 23rd International Conference on Micro Electro Mechanical Systems (MEMS)

Self Cite

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show abstract

“…[22] Controlled roughness on the electrode can be achieved using microelectromechanical techniques like lithography for a systematic study of biocompatible electrodes with size-controlled micro-features dimensions. [23,24] The electrode material affects biofilm electroactivity, as surface resistance and biocompatibility determine the current output and the biofilm attachment, respectively. Most bioelectrochemical studies have been carried out on inert electrodes of carbon materials, such as graphite.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Signature of Escherichia coli on Nickel Micropillar Array Electrode for Early Biofilm Characterization

Astorga

Marsili

et al. 2019

ChemElectroChem

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Biofilms are sessile microbial communities living at interfaces, in which the extracellular matrix is responsible for the mechanical stability and adhesion to surfaces. Transition from planktonic to attached cells is a key step in the biofilm formation process. Monitoring of this transition is needed to prevent contamination of biomedical devices and mitigate microbially influenced corrosion. Under anoxic local conditions and in the presence of an exogenous redox mediator, biofilms can divert part of the electron flow associated with catabolism to electrodes maintained at a defined potential. Extracellular electron transfer (EET) follows upon the attachment of planktonic cells to the surface. Modification of the electrode increases bacterial attachment, thus allowing early bioelectrochemical detection of the biofilm. Here, we report a Ni electrode micropillar array to detect early attachment of Escherichia coli biofilm through mediated EET in potentiostat‐controlled electrochemical cells. The biofilm‐surface interaction is studied by using electrochemical impedance spectroscopy (EIS) at different potentials and temperatures over 24 h. The analysis of the EIS signature highlights the effect of temperature on mediated EET in biofilms. These results demonstrate that micropillared electrodes allow earlier biofilm detection than flat electrodes, which is relevant to biofilm sensing and investigation of microbially influenced corrosion in drinking water systems and biomedical devices.

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Microfabricated Microbial Fuel Cells

Ren

Chae

2015

Micro Energy Harvesting

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Microbial Fuel Cell based on Electrode-Exoelectrogenic Bacteria Interface

Cited by 17 publications

References 7 publications

Real-time biocatalyst loading and electron transfer via microfabricated transparent electrode

Real-time biocatalyst loading and electron transfer via microfabricated transparent electrode

Electrochemical Signature of Escherichia coli on Nickel Micropillar Array Electrode for Early Biofilm Characterization

Microfabricated Microbial Fuel Cells

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