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

Ions and Ionic Charges03:27

Ions and Ionic Charges

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 ions.
Polyprotic Acids03:38

Polyprotic Acids

Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
Common Ion Effect03:24

Common Ion Effect

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
Ion Exchange01:17

Ion Exchange

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 basic...
Transport Number01:31

Transport Number

The transport number is the fraction of the total current carried by an ion in an electrolyte solution. It is defined as the ratio of the current carried by a specific ion to the total current flowing through the solution. The transport number, t, is central to understanding ionic mobility, which describes how fast an ion moves under the influence of an electric field. This link connects the physical behavior of ions in solution to the chemical processes that occur during electrochemical...
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...

You might also read

Related Articles

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

Sort by
Same author

Genomic prediction of bone strength in laying hens using different sources of information.

Animal : an international journal of animal bioscience·2025
Same author

Is oviposition time and oviposition interval associated with the deposition of cuticle on the hen's egg?

British poultry science·2024
Same author

Association of keel bone morphometry with keel bone damage and skeletal quality in the laying hen.

British poultry science·2024
Same author

Corrigendum to "An analysis of the maxillary beak shape variation between 2 pure layer lines and its relationship to the underlying premaxillary bone, feather cover, and mortality" [Poult. Sci. 102 (8) (2023) 102854].

Poultry science·2023
Same author

An analysis of the maxillary beak shape variation between 2 pure layer lines and its relationship to the underlying premaxillary bone, feather cover, and mortality.

Poultry science·2023
Same author

Phase Separation and Nanodomain Formation in Hybrid Polymer/Lipid Vesicles.

ACS macro letters·2022

Related Experiment Video

Updated: Jul 11, 2026

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

Tuning bilayer twist using chiral counterions.

R Oda1, I Huc, M Schmutz

  • 1Institut Européen de Chimie et Biologie, Talence, France. reiko.oda@iecb-polytechnique.u-bordeaux.fr

Nature
|June 22, 1999
PubMed
Summary

Researchers developed tunable chiral supramolecular structures using gemini surfactants and chiral counterions. This breakthrough allows continuous control over twist and pitch in micrometre-scale ribbons, potentially aiding macromolecular crystallization.

More Related Videos

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

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Related Experiment Videos

Last Updated: Jul 11, 2026

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

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

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Biophysics

Background:

  • Chirality is fundamental in biological structures, from molecules to macroscopic assemblies.
  • Controlling supramolecular chirality from molecular chirality is challenging, often leading to phase separation.
  • Amphiphilic molecules self-assemble into chiral mesophases, but quantitative prediction and control remain difficult.

Purpose of the Study:

  • To experimentally and theoretically describe a system for tunable supramolecular chirality.
  • To achieve continuous and controllable variation of chirality in micrometre-scale structures.
  • To explore the potential of these chiral structures as templates for macromolecular crystallization.

Main Methods:

  • Utilized gemini surfactants, which are two surfactant molecules linked at their head groups.
  • Investigated the self-assembly of gemini surfactants into twisted ribbon structures composed of bilayers.
  • Varied the proportion of opposite-handed chiral counterions to tune the helical properties of the ribbons.

Main Results:

  • Observed the formation of twisted ribbons from gemini surfactant bilayers.
  • Demonstrated that the degree of twist and pitch of the ribbons can be continuously tuned.
  • Showcased the influence of chiral counterions on the supramolecular chirality expression.

Conclusions:

  • Developed a novel system for controllable supramolecular chirality using gemini surfactants and chiral counterions.
  • The ability to tune helical structures offers potential applications, such as templating for helical crystallization.
  • This work advances the understanding and control of chirality transfer from molecular to supramolecular scales.