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 Experiment Videos

Carbon composite microelectrodes: charge percolation and electroanalytical performance.

Sonia Ramírez-García1, Salvador Alegret, Francisco Céspedes

  • 1Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.

Analytical Chemistry
|January 31, 2004
PubMed
Summary

New epoxy-graphite composite microelectrodes offer stable performance in organic solvents. These electrodes demonstrate good sensitivity and low detection limits for electroanalytical applications, even without supporting electrolytes.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

A Thermoresponsive, Electrically Conductive Bioink Optimized for Electroactive Tissue Engineering and Bioelectronics.

ACS applied bio materials·2026
Same author

Directing the glow: 3D feeder geometries to enhance planar bipolar electrochemiluminescence.

Chemical communications (Cambridge, England)·2025
Same author

3D Printing of Conducting Polymer Hydrogels for Electrostimulation-Assisted Tissue Engineering.

Advanced materials (Deerfield Beach, Fla.)·2025
Same author

Advances in biosensors for diagnosis of Alzheimer's and Parkinson's diseases.

Biosensors & bioelectronics·2025
Same author

Electric Field Distribution in Bipolar Electrochemical Cells: Effects on the Wirefree Electrodeposition of Conducting Polymer Films.

Analytical chemistry·2024
Same author

Regio selective deposition of conducting polymers using wireless electropolymerisation.

Chemical communications (Cambridge, England)·2024

Area of Science:

  • Electrochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Development of microelectrodes compatible with organic solvents is crucial for advanced electroanalytical techniques.
  • Epoxy-graphite composites offer tunable conductivity and stability for electrode fabrication.

Purpose of the Study:

  • To develop and characterize novel epoxy-graphite composite microelectrodes for use in organic solvents.
  • To optimize electrode composition for enhanced electrical conductivity and stability.
  • To evaluate the performance of these microelectrodes in solution-phase voltammetry.

Main Methods:

  • Fabrication of microelectrodes using two distinct epoxy-graphite composites (Araldite-M/HY5162 and Araldite-PY302-2/HY943).
  • Characterization of bulk conductivity variation with graphite loading using percolation theory.

Related Experiment Videos

  • Voltammetric analysis of ferrocene in acetonitrile and methanol solutions to assess electrode performance.

    • Main Results:

    • Percolation threshold determined at 52% v/v graphite loading, yielding a bulk conductivity of 15 S m⁻¹.
    • Microdisk electrodes (25-µm diameter) fabricated with 60% graphite loading exhibited optimal conductivity and stability.
    • Microelectrodes showed high signal-to-noise ratios, good sensitivity, and low detection limits, with near-ideal ferrocene voltammetry.
    • Long response times (7.5 x 10⁻⁴ to 1.4 x 10⁻¹ s) suitable for time-resolved electroanalysis.
    • Effective voltammetry of ferrocene was achieved even without supporting electrolyte.

    Conclusions:

    • The developed epoxy-graphite composite microelectrodes are stable and effective in organic solvents like acetonitrile and methanol.
    • These electrodes offer excellent analytical performance, including high sensitivity and low detection limits.
    • The ability to perform voltammetry without supporting electrolyte broadens their applicability in electroanalytical studies.