dc.contributor.author
Fazelzadeh, Mohammad
dc.contributor.author
Di, Qingy
dc.contributor.author
Irani, Ehsan
dc.contributor.author
Mokhtari, Zahra
dc.contributor.author
Jabbari-Farouji, Sara
dc.date.accessioned
2024-02-07T12:41:50Z
dc.date.available
2024-02-07T12:41:50Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/42350
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-42075
dc.description.abstract
One key question about transport of active polymers within crowded environments is how spatial order of obstacles influences their conformation and dynamics when compared to disordered media. To this end, we computationally investigate the active transport of tangentially driven polymers with varying degrees of flexibility and activity in two-dimensional square lattices of obstacles. Tight periodic confinement induces notable conformational changes and distinct modes of transport for flexible and stiff active filaments. It leads to caging of low activity flexible polymers inside the inter-obstacle pores while promoting more elongated conformations and enhanced diffusion for stiff polymers at low to moderate activity levels. The migration of flexible active polymers occurs via hopping events, where they unfold to move from one cage to another, similar to their transport in disordered media. However, in ordered media, polymers are more compact and their long-time dynamics is significantly slower. In contrast, stiff chains travel mainly in straight paths within periodic inter-obstacle channels while occasionally changing their direction of motion. This mode of transport is unique to periodic environment and leads to more extended conformation and substantially enhanced long-time dynamics of stiff filaments with low to moderate activity levels compared to disordered media. At high active forces, polymers overcome confinement effects and move through inter-obstacle pores just as swiftly as in open spaces, regardless of the spatial arrangement of obstacles. We explain the center of mass dynamics of semiflexible polymers in terms of active force and obstacle packing fraction by developing an approximate analytical theory.
en
dc.format.extent
13 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
active polymers
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Active motion of tangentially driven polymers in periodic array of obstacles
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
224903
dcterms.bibliographicCitation.doi
10.1063/5.0180170
dcterms.bibliographicCitation.journaltitle
Journal of Chemical Physics
dcterms.bibliographicCitation.number
22
dcterms.bibliographicCitation.volume
159
dcterms.bibliographicCitation.url
https://doi.org/10.1063/5.0180170
refubium.affiliation
Mathematik und Informatik
refubium.affiliation.other
Institut für Mathematik
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refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1089-7690
refubium.resourceType.provider
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