Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep18438
Title: Coil-globule transition of a single semiflexible chain in slitlike confinement
Authors: Dai, L
Renner, C.B
Yan, J 
Doyle, P.S
Keywords: competition
height
model
algorithm
chemistry
phase transition
thermodynamics
polymer
Algorithms
Phase Transition
Polymers
Thermodynamics
Issue Date: 2015
Publisher: Nature Publishing Group
Citation: Dai, L, Renner, C.B, Yan, J, Doyle, P.S (2015). Coil-globule transition of a single semiflexible chain in slitlike confinement. Scientific Reports 5 : 18438. ScholarBank@NUS Repository. https://doi.org/10.1038/srep18438
Rights: Attribution 4.0 International
Abstract: Single polymer chains undergo a phase transition from coiled conformations to globular conformations as the effective attraction between monomers becomes strong enough. In this work, we investigated the coil-globule transition of a semiflexible chain confined between two parallel plates, i.e. a slit, using the lattice model and Pruned-enriched Rosenbluth method (PERM) algorithm. We find that as the slit height decreases, the critical attraction for the coil-globule transition changes non-monotonically due to the competition of the confinement free energies of the coiled and globular states. In wide (narrow) slits, the coiled state experiences more (less) confinement free energy, and hence the transition becomes easier (more difficult). In addition, we find that the transition becomes less sharp with the decreasing slit height. Here, the sharpness refers to the sensitivity of thermodynamic quantities when varying the attraction around the critical value. The relevant experiments can be performed for DNA condensation in microfluidic devices.
Source Title: Scientific Reports
URI: https://scholarbank.nus.edu.sg/handle/10635/180402
ISSN: 2045-2322
DOI: 10.1038/srep18438
Rights: Attribution 4.0 International
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