Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

28.8K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
28.8K
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

466
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
466
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

59.4K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
59.4K
Microbial Nutrition01:28

Microbial Nutrition

537
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
537
Metabolism of Chemolithotrophs01:15

Metabolism of Chemolithotrophs

333
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
333
Microbial Fermentation01:23

Microbial Fermentation

636
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
636

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Reduced mediators released by cyanobacteria during exoelectrogenesis detected using differential pulse voltammetry.

Bioelectrochemistry (Amsterdam, Netherlands)·2026
Same author

An Automated Electrochemistry Platform for Accelerating the Characterization of Enzymatic Electrochemistry.

ACS electrochemistry·2026
Same author

Closing the nitrogen loop in groundwater with biohybrid technologies.

Trends in biotechnology·2026
Same author

Mass Spectrometry Imaging in ACS Journals.

ACS measurement science au·2026
Same author

High-throughput Optical Analysis to Inform Design of Electrochemical Biosensors.

ACS measurement science au·2026
Same author

Data-Driven Electrochemistry Reveals the Impact of Hydrophobicity on Aptamer Cross-Reactivity.

ACS measurement science au·2026

Related Experiment Video

Updated: Oct 20, 2025

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization
11:58

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization

Published on: December 29, 2013

13.7K

A silver assist for microbial fuel cell power.

Erin M Gaffney1, Shelley D Minteer1

  • 1Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA.

Science (New York, N.Y.)
|September 16, 2021
PubMed
Summary

Silver nanoparticles integrated into Shewanella membranes significantly enhance electron transfer rates to graphene electrodes. This advancement improves microbial fuel cell performance and bioelectronic applications.

Area of Science:

  • Microbiology
  • Nanotechnology
  • Electrochemistry

Background:

  • Shewanella species are known for their extracellular electron transfer capabilities.
  • Graphene electrodes offer high surface area and conductivity for bioelectronic devices.
  • Optimizing electron transfer is crucial for efficient bioelectrochemical systems.

Purpose of the Study:

  • To investigate the impact of silver nanoparticles on electron transfer in Shewanella membranes.
  • To assess the potential of silver nanoparticle-modified Shewanella for enhanced bioelectronic applications.

Main Methods:

  • Incorporation of silver nanoparticles into Shewanella cell membranes.
  • Electrochemical measurements of electron transfer to graphene electrodes.
  • Microscopic and spectroscopic characterization of modified membranes.

More Related Videos

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site
05:29

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Published on: July 24, 2018

7.8K
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
09:50

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

12.9K

Related Experiment Videos

Last Updated: Oct 20, 2025

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization
11:58

Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization

Published on: December 29, 2013

13.7K
Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site
05:29

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Published on: July 24, 2018

7.8K
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
09:50

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

12.9K

Main Results:

  • Silver nanoparticles demonstrably increased the rate of electron transfer from Shewanella to graphene electrodes.
  • Enhanced conductivity and altered membrane structure were observed in nanoparticle-modified cells.
  • Improved current generation in microbial fuel cell setups utilizing modified Shewanella.

Conclusions:

  • Silver nanoparticles serve as effective mediators to boost extracellular electron transfer in Shewanella.
  • This strategy offers a promising approach for developing more efficient microbial fuel cells and biosensors.