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Self-assembly and entropic effects in pear-shaped colloid systems. II. Depletion attraction of pear-shaped particles in a hard-sphere solvent

Schonhofer, Philipp; Marechal, Matthieu; Cleaver, Douglas; Schroeder-Turk, Gerd

Description

We consider depletion effects of a pear-shaped colloidal particle in a hard-sphere solvent for two different model realizations of the pear-shaped colloidal particle. The two models are the pear hard Gaussian overlap (PHGO) particles and the hard pears of revolution (HPR). The motivation for this study is to provide a microscopic understanding for the substantially different mesoscopic self-assembly properties of these pear-shaped colloids, in dense suspensions, that have been reported in the...[Show more]

dc.contributor.authorSchonhofer, Philipp
dc.contributor.authorMarechal, Matthieu
dc.contributor.authorCleaver, Douglas
dc.contributor.authorSchroeder-Turk, Gerd
dc.date.accessioned2022-07-21T23:29:24Z
dc.date.available2022-07-21T23:29:24Z
dc.identifier.issn1089-7690
dc.identifier.urihttp://hdl.handle.net/1885/269861
dc.description.abstractWe consider depletion effects of a pear-shaped colloidal particle in a hard-sphere solvent for two different model realizations of the pear-shaped colloidal particle. The two models are the pear hard Gaussian overlap (PHGO) particles and the hard pears of revolution (HPR). The motivation for this study is to provide a microscopic understanding for the substantially different mesoscopic self-assembly properties of these pear-shaped colloids, in dense suspensions, that have been reported in the previous studies. This is done by determining their differing depletion attractions via Monte Carlo simulations of PHGO and HPR particles in a pool of hard spheres and comparing them with excluded volume calculations of numerically obtained ideal configurations on the microscopic level. While the HPR model behaves as predicted by the analysis of excluded volumes, the PHGO model showcases a preference for splay between neighboring particles, which can be attributed to the special non-additive characteristics of the PHGO contact function. Lastly, we propose a potentially experimentally realizable pear-shaped particle model, the non-additive hard pear of revolution model, which is based on the HPR model but also features non-additive traits similar to those of PHGO particles to mimic their depletion behavior.
dc.description.sponsorshipThe authors thank Universities Australia and the German Academic Exchange Service (DAAD) for funds through a collaboration funding scheme, through the grant “Absorption and confinement of complex fluids.” They also thank the DFG through Grant No. ME1361/11-2 and through the research group “Geometry and Physics of Spatial Random Systems” (GPSRS) for funding. They gratefully acknowledge Klaus Mecke’s support and advice in useful discussions. P.W.A.S. acknowledges a Murdoch University Postgraduate Research Scholarship. G.E.S.-T. is grateful to the Food Science Department at the University of Copenhagen and the Physical Chemistry group at Lund University for their hospitality and to Copenhagen University, the Camurus Lipid Research Foundation, and the Danish National Bank for enabling a sabbatical stay in Denmark and Sweden.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Institute of Physics (AIP)
dc.rights© 2020 Author(s).
dc.sourceThe Journal of Chemical Physics
dc.titleSelf-assembly and entropic effects in pear-shaped colloid systems. II. Depletion attraction of pear-shaped particles in a hard-sphere solvent
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume153
dc.date.issued2020
local.identifier.absfor510405 - Soft condensed matter
local.identifier.ariespublicationa383154xPUB14463
local.publisher.urlhttp://jcp.aip.org/
local.type.statusPublished Version
local.contributor.affiliationSchonhofer, Philipp, Murdoch University
local.contributor.affiliationMarechal, Matthieu, Friedrich-Alexander-Universitaet Erlangen-Nuernberg
local.contributor.affiliationCleaver, Douglas, Sheffield Hallam University
local.contributor.affiliationSchroeder-Turk, Gerd, College of Science, ANU
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage034904-1
local.bibliographicCitation.lastpage034904-14
local.identifier.doi10.1063/5.0007287
dc.date.updated2021-08-01T08:23:25Z
local.identifier.scopusID2-s2.0-85088850313
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/9875..."The Published Version can be archived in Institutional Repository" from SHERPA/RoMEO site (as at 22/07/2022).
CollectionsANU Research Publications

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