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000276402 1001_ $$0P:(DE-Juel1)156528$$aRiest, Jonas$$b0$$ufzj
000276402 245__ $$aElasticity of polymeric nanocolloidal particles
000276402 260__ $$aLondon$$bNature Publishing Group$$c2015
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000276402 520__ $$aSoftness is an essential mechanical feature of macromolecular particles such as polymer-grafted nanocolloids, polyelectrolyte networks, cross-linked microgels as well as block copolymer and dendrimer micelles. Elasticity of individual particles directly controls their swelling, wetting, and adsorption behaviour, their aggregation and self-assembly as well as structural and rheological properties of suspensions. Here we use numerical simulations and self-consistent field theory to study the deformation behaviour of a single spherical polymer brush upon diametral compression. We observe a universal response, which is rationalised using scaling arguments and interpreted in terms of two coarse-grained models. At small and intermediate compressions the deformation can be accurately reproduced by modelling the brush as a liquid drop, whereas at large compressions the brush behaves as a soft ball. Applicable far beyond the pairwise-additive small-strain regime, the models may be used to describe microelasticity of nanocolloids in severe confinement including dense disordered and crystalline phases.
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000276402 7001_ $$0P:(DE-HGF)0$$aAthanasopoulou, Labrini$$b1
000276402 7001_ $$0P:(DE-HGF)0$$aEgorov, Sergei A.$$b2
000276402 7001_ $$0P:(DE-HGF)0$$aLikos, Christos N.$$b3
000276402 7001_ $$0P:(DE-HGF)0$$aZiherl, Primož$$b4$$eCorresponding author
000276402 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/srep15854$$gVol. 5, p. 15854 -$$p15854 -$$tScientific reports$$v5$$x2045-2322$$y2015
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