Screened Coulomb interactions of general macroions with nonzero particle volume

Everts, Jeffrey Christopher (author)

A semianalytical approach is developed to calculate the effective pair potential of rigid arbitrarily shaped macroions with a nonvanishing particle volume, valid within linear screening theory and the mean-field approximation. The essential ingredient for this framework is a mapping of the particle to a singular charge distribution with adjustable effective charge and shape parameters determined by the particle surface electrostatic potential. For charged spheres, this method reproduces the well-known Derjaguin- andau-Verwey-Overbeek (DLVO) potential. Further exemplary benchmarks of the method for more complicated cases, like tori, triaxial ellipsoids, and additive torus-sphere mixtures, leads to accurate closed-form integral expressions for all particle separations and orientations. The findings are relevant for determining the phase behavior of macroions with experiments and simulations for various particle shapes.

• Language: English
• Keywords: soft matter physics, electrostatics, electrostatic potential, macroions
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: Str. 033144-1-033144-13
• Numbering: Vol. 2, iss. 3
• PID: 20.500.12556/RUL-117826
• UDC: 537.2
• ISSN on article: 2643-1564
• DOI: 10.1103/PhysRevResearch.2.033144
• COBISS.SI-ID: 23873539
• Publication date in RUL: 29.07.2020

Record is a part of a journal

• Title: Physical review research
• Publisher: American Phyisical Society
• ISSN: 2643-1564
• COBISS.SI-ID: 32822823

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: 29.07.2020

Secondary language

• Language: Slovenian
• Keywords: fizika mehke snovi, elektrostatika, elektrostatski potencial, makroioni

Projects

• Funder: EC - European Commission
• Funding programme: H2020
• Project number: 795377
• Name: Topological Colloidal Double Layers
• Acronym: TCDL

• Funder: ARRS - Slovenian Research Agency
• Project number: J1-9149
• Name: Orientacijske interakcije v posplošenem Thomsonovem problemu: dipolna stabilizacija sferičnih nanostruktur