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000894290 1001_ $$0P:(DE-HGF)0$$aMousavi, S. Mahdiyeh$$b0
000894290 245__ $$aActive bath-induced localization and collapse of passive semiflexible polymers
000894290 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2021
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000894290 520__ $$aThe conformational and dynamical properties of a passive polymer embedded in a bath of active Brownian particles (ABPs) are studied by Langevin dynamics simulations. Various activities and ABP concentrations below and above the critical values for motility-induced phase separation (MIPS) are considered. In a homogeneous ABP fluid, the embedded polymer swells with increasing bath activity, with stronger swelling for larger densities. The polymer dynamics is enhanced, with the diffusion coefficient increasing by a power-law with increasing activity, where the exponent depends on the ABP concentration. For ABP concentrations in the MIPS regime, we observe a localization of the polymer in the low-density ABP phase associated with polymer collapse for moderate activities and a reswelling for high activities accom- panied by a preferred localization in the high-density ABP phase. Localization and reswelling are independent of the polymer stiffness, with stiff polymers behaving similarly to flexible polymers. The polymer collapse is associated with a slowdown of its dynamics and a significantly smaller center-of-mass diffusion coefficient. In general, the polymer dynamics can only partially be described by an effective (bath) tempera- ture. Moreover, the properties of a polymer embedded in a homogeneous active bath deviate quantitatively from those of a polymer composed of active monomers, i.e., linear chains of ABPs; however, such a polymer exhibits qualitatively similar activity-dependent features.
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000894290 7001_ $$0P:(DE-Juel1)130665$$aGompper, Gerhard$$b1
000894290 7001_ $$0P:(DE-Juel1)131039$$aWinkler, Roland G.$$b2$$eCorresponding author$$ufzj
000894290 773__ $$0PERI:(DE-600)1473050-9$$a10.1063/5.0058150$$gVol. 155, no. 4, p. 044902 -$$n4$$p044902$$tThe journal of chemical physics$$v155$$x1089-7690$$y2021
000894290 8564_ $$uhttps://juser.fz-juelich.de/record/894290/files/5.0058150.pdf$$yPublished on 2021-07-22. Available in OpenAccess from 2022-07-22.
000894290 8564_ $$uhttps://juser.fz-juelich.de/record/894290/files/poly_act_bath_rev.pdf$$yPublished on 2021-07-22. Available in OpenAccess from 2022-07-22.
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