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

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

373
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
373
Ion Exchange01:17

Ion Exchange

565
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
565
Equipotential Surfaces and Conductors01:16

Equipotential Surfaces and Conductors

3.4K
For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to equipotential surfaces. Therefore, in a conductor with static charges, the electric field just outside the conductor is always perpendicular to the conductor's surface. Any tangential component of the electric field will cause charges to move inside the conductor, which will violate the electrostatic nature of the system. In an electrostatic...
3.4K
Formation of Complex Ions03:45

Formation of Complex Ions

23.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.5K
Ionic Strength: Overview01:12

Ionic Strength: Overview

1.3K
The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
1.3K
Ions and Ionic Charges03:27

Ions and Ionic Charges

66.4K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
66.4K

You might also read

Related Articles

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

Sort by
Same author

Retraction Note: Spironolactone inhibits apoptosis in rat mesangial cells under hyperglycaemic conditions via the Wnt signalling pathway.

Molecular and cellular biochemistry·2025
Same author

Thioxanthone Skeleton-Based One-Component Macro-Photoinitiator Reduces Oxygen Inhibition and Migration Through Cooperative Effect.

Polymers·2025
Same author

Joule-Heating-Synthesized Iodine-Nitrogen Metal-Free Nanofiber for H<sub>2</sub>O<sub>2</sub> Electroproduction via a Coordination Microenvironment Regulation Strategy.

Nano letters·2025
Same author

TMCO1, as a potential biomarker of prognosis and immunotherapy response, regulates head and neck squamous cell carcinoma proliferation and migration.

Discover oncology·2025
Same author

Superlubricity Microcapsules.

ACS applied materials & interfaces·2025
Same author

Natural killer cells: a future star for immunotherapy of head and neck squamous cell carcinoma.

Frontiers in immunology·2024

Related Experiment Video

Updated: Jun 17, 2025

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

8.5K

Counterion Distribution in the Stern Layer on Charged Surfaces.

Tianyi Han1, Wanxing Xu1, Jie Han1

  • 1State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, People's Republic of China.

Nano Letters
|August 14, 2024
PubMed
Summary

We directly measured counterion adsorption density in the Stern layer, finding it depends on surface charge, not bulk concentration. Charge inversion concentration is sensitive to ion type and valence, crucial for understanding interfacial ion behavior.

Keywords:
Stern layerinterfacial adsorptionion distributionsurface charge densityzeta potential

More Related Videos

Measurement of Ion Concentration in the Unstirred Boundary Layer with Open Patch-Clamp Pipette: Implications in Control of Ion Channels by Fluid Flow
05:42

Measurement of Ion Concentration in the Unstirred Boundary Layer with Open Patch-Clamp Pipette: Implications in Control of Ion Channels by Fluid Flow

Published on: January 7, 2019

6.3K
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

14.4K

Related Experiment Videos

Last Updated: Jun 17, 2025

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

8.5K
Measurement of Ion Concentration in the Unstirred Boundary Layer with Open Patch-Clamp Pipette: Implications in Control of Ion Channels by Fluid Flow
05:42

Measurement of Ion Concentration in the Unstirred Boundary Layer with Open Patch-Clamp Pipette: Implications in Control of Ion Channels by Fluid Flow

Published on: January 7, 2019

6.3K
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

14.4K

Area of Science:

  • Physical Chemistry
  • Surface Science
  • Electrochemistry

Background:

  • Counterion adsorption at solid-liquid interfaces is critical for many applications.
  • Quantifying counterion adsorption density within the Stern layer remains a challenge.

Purpose of the Study:

  • To directly determine the counterion adsorption density in the Stern layer.
  • To investigate the factors influencing Stern layer adsorption and charge inversion concentration.

Main Methods:

  • Extension of the Grahame equation.
  • Streaming current measurements on various solid surfaces in aqueous electrolytes.

Main Results:

  • Direct determination of surface charge density at the shear plane.
  • Counterion adsorption density in the Stern layer correlates with surface charge density, minimally impacted by bulk ion concentration.
  • Charge inversion concentration is primarily influenced by ion type and valence, not the charged surface itself.

Conclusions:

  • Provides a direct method for evaluating Stern layer counterion adsorption.
  • Highlights the roles of ionic competitive adsorption and ion-ion correlations in charge inversion.
  • Offers a framework for understanding ion distribution in interfacial processes involving the Stern layer.