Complex electric double layers in charged topological colloids

Everts, Jeffrey Christopher (avtor), Ravnik, Miha (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: physical chemistry, charged surfaces, colloids, electric double layers
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2018
• Št. strani: 10 str.
• Številčenje: Vol. 8, art. no. 14119
• PID: 20.500.12556/RUL-103641
• UDK: 544.6/.7
• ISSN pri članku: 2045-2322
• DOI: 10.1038/s41598-018-32550-8
• COBISS.SI-ID: 3239524
• Datum objave v RUL: 20.09.2018

Gradivo je del revije

• Naslov: Scientific reports
• Skrajšan naslov: Sci. rep.
• Založnik: Nature Publishing Group
• ISSN: 2045-2322
• COBISS.SI-ID: 18727432

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 20.09.2018

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: fizikalna kemija, površinski pojavi, koloidi, električna dvojna plast

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 795377
• Naslov: Topological Colloidal Double Layers
• Akronim: TCDL