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Stepwise conformation transitions for a semi-stiff ring polymer confined in a conical trap induced by the increasing external field or by cone's opening angle variation
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
2013 (English)In: Nanosystems: Physics, Chemistry, Mathematics, ISSN 2220-8054, Vol. 4, no 2, 225-235 p.Article in journal (Refereed) Published
Abstract [en]

In this paper a stepwise compaction process of a ring semi-stiff polymer chain placed in a 3d conical nano-cavity and being under the action of the increasing external field is studied. Compaction from a circle- like shape to several toroidal-like loops for a three-dimensional system was observed. The thermodynamic stability of these toroidal-like structures was investigated by observing a hysteresis of the compaction- extension curves. This study extends our previous work [1] with investigation of the effect of the cone opening angle variation on the distinct shape transitions. 

Place, publisher, year, edition, pages
St. Petersburg National Research University of Information Technologies, Mechanics and Optics , 2013. Vol. 4, no 2, 225-235 p.
Keyword [en]
semi-stiff ring polymers, Monte Carlo, compact structures, shape transitions, confinement, nanocone
National Category
Condensed Matter Physics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-206386OAI: oai:DiVA.org:uu-206386DiVA: diva2:644501
Available from: 2013-08-30 Created: 2013-08-30 Last updated: 2013-09-04Bibliographically approved

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Siretskiy, AlexeyElvingson, Christer

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