How to polarise an interface with ions: the discrete Helmholtz model.

Chemical Science
Grégoire C GschwendHubert H Girault

Abstract

The distribution of electrolytes in an electric field usually relies on theories based on the Poisson-Boltzmann formalism. These models predict that, in the case of a metallic electrode, ionic charges screen the electrode potential, leading to concentration-dependent ion distributions. This theoretical framework was first applied at solid-liquid interfaces and then transposed to soft interfaces. However, in this latter case, the potential in which the electrolytes evolve is not homogeneous, which is less amenable to a mean-field description. In this report, we show that at polarised soft interfaces the potential difference takes place between two closely interacting ionic monolayers. In this configuration, ions of opposite charges directly neutralise each other leading to an absence of diffuse layers and charge screening by surrounding ions. Thus, independently of the electrolyte concentrations, the surface charge density is a linear function of the potential difference, which results in a constant capacitance.

References

Oct 8, 2005·Journal of Computational Chemistry·David Van Der SpoelHerman J C Berendsen
Jan 18, 2006·Science·Guangming LuoMark L Schlossman
Jun 14, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Wei BuAlex Travesset
Jan 11, 2007·The Journal of Chemical Physics·Giovanni BussiMichele Parrinello
Aug 26, 1994·Science·P G Kusalik, I M Svishchev
Apr 19, 2011·Journal of Computational Chemistry·Naveen Michaud-AgrawalOliver Beckstein
Oct 18, 2011·Biochimica Et Biophysica Acta·James GumbartBenoît Roux
Nov 24, 2012·Proceedings of the National Academy of Sciences of the United States of America·Nouamane LaanaitMark L Schlossman
Jan 1, 2008·Journal of Chemical Theory and Computation·Berk Hess
Mar 1, 2008·Journal of Chemical Theory and Computation·Berk HessErik Lindahl
Nov 1, 2006·Journal of Chemical Theory and Computation·Kasper P Jensen, William L Jorgensen
Feb 6, 2017·The Journal of Chemical Physics·Cornelis LütgebaucksSylvie Roke
Jun 3, 2017·Advances in Colloid and Interface Science·Klemen BohincSylvio May
Sep 20, 2017·Nature Reviews. Neuroscience·Leonid P SavtchenkoDmitri A Rusakov
Apr 20, 2018·Science Advances·Lisa B DreierMischa Bonn
Nov 28, 2018·Nature Materials·A FangA Smolyanitsky

❮ Previous
Next ❯

Citations

May 13, 2021·Journal of the American Chemical Society·Haiqiang DengDaniel Mandler
Oct 6, 2021·Physical Chemistry Chemical Physics : PCCP·Kosuke IshiiNaoya Nishi
Nov 3, 2021·Physical Chemistry Chemical Physics : PCCP·Guillaume Le BretonClaire Loison

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
optical spectroscopy

Software Mentioned

CHELPG
MDanalysis
US
GROMACS
GAMESS

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.