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Complex electric double layers in charged topological colloids
Everts, Jeffrey Christopher (Author), Ravnik, Miha (Author)

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Abstract
Charged surfaces in contact with liquids containing ions are accompanied in equilibrium by an electric double layer consisting of a layer of electric charge on the surface that is screened by a diffuse ion cloud in the bulk fluid.This screening cloud determines not only the interactions between charged colloidal particles or polyelectrolytes and their self-assembly into ordered structures, but it is also pivotal in understanding energy storage devices, such as electrochemical cells and supercapacitors. However, little is known to what spatial complexity the electric double layers can be designed. Here, we show that electric double layers of non-trivial topology and geometry -including tori, multi-tori and knots- can be realised in charged topological colloidal particles, using numerical modelling within a mean-field Poisson-Boltzmann theory.We show that the complexity of double layers -including geometry and topology- can be tuned by changing the Debye screening length of the medium, or by changing the shape and topology of the (colloidal) particle. More generally,this work is an attempt to introduce concepts of topology in the field of charged colloids, which could lead to novel exciting material design paradigms.

Language:English
Keywords:physical chemistry, charged surfaces, colloids, electric double layers
Tipology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Year:2018
Number of pages:10 str.
Numbering:Vol. 8, art. no. 14119
UDC:544.6/.7
ISSN on article:2045-2322
DOI:10.1038/s41598-018-32550-8 This link opens in a new window
COBISS.SI-ID:3239524 This link opens in a new window
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Downloads:421
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Record is a part of a journal

Title:Scientific reports
Shortened title:Sci. rep.
Publisher:Springer Nature
ISSN:2045-2322
COBISS.SI-ID:18727432 This link opens in a new window

Document is financed by a project

Funder:EC - European Commission
Funding Programme:H2020
Project no.:795377
Name:Topological Colloidal Double Layers
Acronym:TCDL

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:20.09.2018

Secondary language

Language:Slovenian
Keywords:fizikalna kemija, površinski pojavi, koloidi, električna dvojna plast

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