Elasticity of polymeric nanocolloidal particles

Softness is an essential mechanical feature of macromolecular particles such as polymer-grafted nanocolloids, polyelectrolyte networks, cross-linked microgels as well as block copolymer and dendrimer micelles. Elasticity of individual particles directly controls their swelling, wetting, and adsorpti...

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Main Authors:	Riest, Jonas, Athanasopoulou, Labrini, Egorov, Sergei A., Likos, Christos N., Ziherl, Primož
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629145/

id	pubmed-4629145
recordtype	oai_dc
spelling	pubmed-46291452015-11-05 Elasticity of polymeric nanocolloidal particles Riest, Jonas Athanasopoulou, Labrini Egorov, Sergei A. Likos, Christos N. Ziherl, Primož Article Softness is an essential mechanical feature of macromolecular particles such as polymer-grafted nanocolloids, polyelectrolyte networks, cross-linked microgels as well as block copolymer and dendrimer micelles. Elasticity of individual particles directly controls their swelling, wetting, and adsorption behaviour, their aggregation and self-assembly as well as structural and rheological properties of suspensions. Here we use numerical simulations and self-consistent field theory to study the deformation behaviour of a single spherical polymer brush upon diametral compression. We observe a universal response, which is rationalised using scaling arguments and interpreted in terms of two coarse-grained models. At small and intermediate compressions the deformation can be accurately reproduced by modelling the brush as a liquid drop, whereas at large compressions the brush behaves as a soft ball. Applicable far beyond the pairwise-additive small-strain regime, the models may be used to describe microelasticity of nanocolloids in severe confinement including dense disordered and crystalline phases. Nature Publishing Group 2015-11-02 /pmc/articles/PMC4629145/ /pubmed/26522242 http://dx.doi.org/10.1038/srep15854 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Riest, Jonas Athanasopoulou, Labrini Egorov, Sergei A. Likos, Christos N. Ziherl, Primož
spellingShingle	Riest, Jonas Athanasopoulou, Labrini Egorov, Sergei A. Likos, Christos N. Ziherl, Primož Elasticity of polymeric nanocolloidal particles
author_facet	Riest, Jonas Athanasopoulou, Labrini Egorov, Sergei A. Likos, Christos N. Ziherl, Primož
author_sort	Riest, Jonas
title	Elasticity of polymeric nanocolloidal particles
title_short	Elasticity of polymeric nanocolloidal particles
title_full	Elasticity of polymeric nanocolloidal particles
title_fullStr	Elasticity of polymeric nanocolloidal particles
title_full_unstemmed	Elasticity of polymeric nanocolloidal particles
title_sort	elasticity of polymeric nanocolloidal particles
description	Softness is an essential mechanical feature of macromolecular particles such as polymer-grafted nanocolloids, polyelectrolyte networks, cross-linked microgels as well as block copolymer and dendrimer micelles. Elasticity of individual particles directly controls their swelling, wetting, and adsorption behaviour, their aggregation and self-assembly as well as structural and rheological properties of suspensions. Here we use numerical simulations and self-consistent field theory to study the deformation behaviour of a single spherical polymer brush upon diametral compression. We observe a universal response, which is rationalised using scaling arguments and interpreted in terms of two coarse-grained models. At small and intermediate compressions the deformation can be accurately reproduced by modelling the brush as a liquid drop, whereas at large compressions the brush behaves as a soft ball. Applicable far beyond the pairwise-additive small-strain regime, the models may be used to describe microelasticity of nanocolloids in severe confinement including dense disordered and crystalline phases.
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629145/
_version_	1613495976030371840

Elasticity of polymeric nanocolloidal particles

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