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dc.contributor.authorKantor, Yacov
dc.contributor.authorKardar, Mehran
dc.date.accessioned2018-04-03T19:36:11Z
dc.date.available2018-04-03T19:36:11Z
dc.date.issued2017-08
dc.date.submitted2017-06
dc.identifier.issn2470-0045
dc.identifier.issn2470-0053
dc.identifier.urihttp://hdl.handle.net/1721.1/114530
dc.description.abstractWe consider forces acting on objects immersed in, or attached to, long fluctuating polymers. The confinement of the polymer by the obstacles results in polymer-mediated forces that can be repulsive (due to loss of entropy) or attractive (if some or all surfaces are covered by adsorbing layers). The strength and sign of the force in general depends on the detailed shape and adsorption properties of the obstacles but assumes simple universal forms if characteristic length scales associated with the objects are large. This occurs for scale-free shapes (such as a flat plate, straight wire, or cone) when the polymer is repelled by the obstacles or is marginally attracted to it (close to the depinning transition where the absorption length is infinite). In such cases, the separation h between obstacles is the only relevant macroscopic length scale, and the polymer-mediated force equals Ak_{B}T/h, where T is temperature. The amplitude A is akin to a critical exponent, depending only on geometry and universality of the polymer system. The value of A, which we compute for simple geometries and ideal polymers, can be positive or negative. Remarkably, we find A=0 for ideal polymers at the adsorption transition point, irrespective of shapes of the obstacles, i.e., at this special point there is no polymer-mediated force between obstacles (scale free or not).en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant DMR-1206323)en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevE.96.022148en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Physical Societyen_US
dc.titleAttractive and repulsive polymer-mediated forces between scale-free surfacesen_US
dc.typeArticleen_US
dc.identifier.citationKantor, Yacov and Mehran Kardar. "Attractive and repulsive polymer-mediated forces between scale-free surfaces." Physical Review E 96, 2 (August 2017): 022148 © 2017 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorKardar, Mehran
dc.relation.journalPhysical Review Een_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2017-11-14T22:46:37Z
dc.language.rfc3066en
dc.rights.holderAmerican Physical Society
dspace.orderedauthorsKantor, Yacov; Kardar, Mehranen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-1112-5912
mit.licensePUBLISHER_POLICYen_US


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