This title appears in the Scientific Report :
2021
Please use the identifier:
http://dx.doi.org/10.1063/5.0058150 in citations.
Please use the identifier: http://hdl.handle.net/2128/28560 in citations.
Active bath-induced localization and collapse of passive semiflexible polymers
Active bath-induced localization and collapse of passive semiflexible polymers
The 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 conside...
Saved in:
Personal Name(s): | Mousavi, S. Mahdiyeh |
---|---|
Gompper, Gerhard / Winkler, Roland G. (Corresponding author) | |
Contributing Institute: |
Jülich Aachen Research Alliance - High-Performance Computing; JARA-HPC JARA-SOFT; JARA-SOFT Theoretische Physik der Lebenden Materie; IBI-5 Theorie der Weichen Materie und Biophysik; IAS-2 |
Published in: | The journal of chemical physics, 155 (2021) 4, S. 044902 |
Imprint: |
Melville, NY
American Institute of Physics
2021
|
DOI: |
10.1063/5.0058150 |
Document Type: |
Journal Article |
Research Program: |
Molecular Information Processing in Cellular Systems |
Link: |
Published on 2021-07-22. Available in OpenAccess from 2022-07-22. Published on 2021-07-22. Available in OpenAccess from 2022-07-22. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/28560 in citations.
The 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. |