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Slimani MZ, Bacova P, Bernabei M, et al. Cluster Glasses of Semiflexible Ring Polymers. ACS Macro Lett. 2014;3(7):611-616doi: 10.1021/mz500117v.
Slimani, M. Z., Bacova, P., Bernabei, M., Narros, A., Likos, C. N., & Moreno, A. J. (2014). Cluster Glasses of Semiflexible Ring Polymers. ACS macro letters, 3(7), 611-616. https://doi.org/10.1021/mz500117v
Slimani, Mohammed Zakaria, et al. "Cluster Glasses of Semiflexible Ring Polymers." ACS macro letters vol. 3,7 (2014): 611-616. doi: https://doi.org/10.1021/mz500117v
Slimani MZ, Bacova P, Bernabei M, Narros A, Likos CN, Moreno AJ. Cluster Glasses of Semiflexible Ring Polymers. ACS Macro Lett. 2014 Jul 15;3(7):611-616. doi: 10.1021/mz500117v. Epub 2014 Jun 12. PMID: 25083314; PMCID: PMC4111402.
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ACS Macro Lett. 2014 Jul 15;3(7):611-616. doi: 10.1021/mz500117v. Epub 2014 Jun 12.

Cluster Glasses of Semiflexible Ring Polymers.

ACS macro letters

Mohammed Zakaria Slimani, Petra Bacova, Marco Bernabei, Arturo Narros, Christos N Likos, Angel J Moreno

Affiliations

  1. Donostia International Physics Center , Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain.
  2. Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU) , Apartado 1072, E-20080 San Sebastián, Spain ; Materials Physics Center MPC , Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain.
  3. Donostia International Physics Center , Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain ; Departament de Fisica Fonamental, Universitat de Barcelona , Martí i Franquès 1, E-08028 Barcelona, Spain.
  4. Faculty of Physics, University of Vienna , Boltzmanngasse 5, A-1090 Vienna, Austria.
  5. Donostia International Physics Center , Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain ; Materials Physics Center MPC , Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain ; Centro de Física de Materiales (CSIC, UPV/EHU) , Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain.

PMID: 25083314 PMCID: PMC4111402 DOI: 10.1021/mz500117v

Abstract

We present computer simulations of concentrated solutions of unknotted nonconcatenated semiflexible ring polymers. Unlike in their flexible counterparts, shrinking involves a strong energetic penalty, favoring interpenetration and clustering of the rings. We investigate the slow dynamics of the centers-of-mass of the rings in the amorphous cluster phase, consisting of disordered columns of oblate rings penetrated by bundles of prolate ones. Scattering functions reveal a striking decoupling of self- and collective motions. Correlations between centers-of-mass exhibit slow relaxation, as expected for an incipient glass transition, indicating the dynamic arrest of the cluster positions. However, self-correlations decay at much shorter time scales. This feature is a manifestation of the fast, continuous exchange and diffusion of the individual rings over the matrix of clusters. Our results reveal a novel scenario of glass formation in a simple monodisperse system, characterized by self-collective decoupling, soft caging, and mild dynamic heterogeneity.

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