English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We perform molecular dynamics simulations of ionic liquids confined betweengraphene walls under a large variety of conditions (pure ionic liquids,mixtures with water and alcohols, mixtures with lithium salts and defectivegraphene walls). Our results show that the formation of striped and hexagonalpatterns in the Stern layer can be considered as a general feature of ionicliquids at electrochemical interfaces, the transition between patterns beingcontrolled by the net balance of charge in the innermost layer of adsorbedmolecules. This explains previously reported experimental and computationalresults and, for the first time, why these pattern changes are triggered by anyperturbation of the charge density at the innermost layer of the electricdouble layer (voltage and composition changes, and vacancies at the electrodewalls, among others), which may help tuning electrode-ionic liquid interfaces.Using Monte Carlo simulations we show that such structures can be reproduced bya simple two-dimensional lattice model with only nearest-neighbourinteractions, governed by highly screened ionic interactions and short-rangeand excluded volume interactions. We also show that the results of oursimulations are consistent with those inferred from the Landau-Brazovskiitheory of pattern formation in self-assembling systems. The presence of thesepatterns at the ionic liquid graphene-electrode interfaces may have a strongimpact on the process of ionic transfer from the bulk mixtures to theelectrodes, on the differential capacitance of the electrode-electrolyte doublelayer or on the rates of redox reactions at the electrodes, among otherphysicochemical properties, and is therefore an effect of great technologicalinterest.

Two-dimensional pattern formation in ionic liquids confined between graphene walls