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

The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Debye–Huckel–Onsager Conductance Equation01:28

Debye–Huckel–Onsager Conductance Equation

The Debye-Hückel-Onsager equation is a cornerstone of physical chemistry, providing a method to determine the molar conductance (Λm) and molar conductance at infinite dilution (Λ°m) for uni-univalent electrolytes.Uni-univalent electrolytes are electrolytes that dissociate in solution to produce one cation with a +1 charge and one anion with a –1 charge per formula unit.This equation addresses two crucial phenomena: the asymmetry effect and the electrophoretic effect. According to this equation,...
Processes at Electrodes01:30

Processes at Electrodes

The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
Boundary Conditions for Current Density01:25

Boundary Conditions for Current Density

Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.

You might also read

Related Articles

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

Sort by
Same author

An artefact-resilient wide bandwidth bidirectional graphene neural interface.

Nature communications·2026
Same author

Mitigating Interfacial Contamination for Scalable Integration of Graphene in Neuroelectronic Devices.

Accounts of materials research·2026
Same author

Long-Term Stable Neural Interfaces with Nanoporous Graphene Electrodes and Hybrid Polyimide-Aluminium Oxide Encapsulation.

Small methods·2025
Same author

Flexible graphene-based neurotechnology for high-precision deep brain mapping and neuromodulation in Parkinsonian rats.

Nature communications·2025
Same author

Interfacing with the Brain: How Nanotechnology Can Contribute.

ACS nano·2025
Same author

Amorphous nitride semiconductors with highly tunable optical and electronic properties: the benefits of disorder in Ca-Zn-N thin films.

Materials horizons·2024

Related Experiment Video

Updated: Jul 6, 2026

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
08:32

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes

Published on: June 30, 2019

The diamond/aqueous electrolyte interface: an impedance investigation.

Jose A Garrido1, Stefan Nowy, Andreas Härtl

  • 1Walter Schottky Institut, Technische Universität München, Garching, Germany. garrido@wsi.tum.de

Langmuir : the ACS Journal of Surfaces and Colloids
|March 8, 2008
PubMed
Summary

This study reveals that only water-dissociated ions, hydroxide and hydronium, affect the electrochemical double layer at hydrogen-terminated diamond electrodes. Other dissolved ions do not influence this interface, impacting surface conductivity and pH sensitivity.

More Related Videos

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
09:36

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

Related Experiment Videos

Last Updated: Jul 6, 2026

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
08:32

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes

Published on: June 30, 2019

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
09:36

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

Area of Science:

  • Electrochemistry
  • Materials Science
  • Surface Science

Background:

  • Diamond electrodes offer unique electrochemical properties.
  • Understanding the electrochemical interface is crucial for diamond-based devices.
  • Hydrogen-terminated diamond surfaces exhibit distinct electrical characteristics.

Purpose of the Study:

  • To investigate the electrochemical interface of diamond electrodes with aqueous electrolytes.
  • To determine the role of ion adsorption in modifying the double layer.
  • To explore the origins of surface conductivity and pH sensitivity in diamond.

Main Methods:

  • Cyclic voltammetry and AC impedance spectroscopy were employed.
  • Experiments utilized both boron-doped polycrystalline and single crystalline diamond electrodes.
  • The influence of pH and ionic strength on the electrochemical double layer was evaluated.

Main Results:

  • The electrochemical interface is dominated by the electrochemical double layer.
  • Ion adsorption significantly impacts the double layer only by hydroxide and hydronium ions from water auto-dissociation.
  • Adsorption of common ions (Na+, K+, Cl-) showed no observable effect.
  • Surface conductivity is influenced by redox couples like O2/OH- and H2/H3O+.

Conclusions:

  • The electrochemical behavior of hydrogen-terminated diamond is primarily governed by water's own ions.
  • External dissolved ions do not significantly alter the diamond-electrolyte interface charge.
  • Surface conductivity and pH sensitivity are linked to specific redox reactions at the diamond surface.