Different pathways in mechanical unfolding/folding cycle of a single semiflexible polymer

N. Yoshinaga, K. Yoshikawa, T. Ohta

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Kinetics of conformational change of a semiflexible polymer under mechanical external field were investigated with Langevin dynamics simulations. It is found that a semiflexible polymer exhibits large hysteresis in mechanical folding/unfolding cycle even with a slow operation, whereas in a flexible polymer, the hysteresis almost disappears at a sufficiently slow operation. This suggests that the essential features of the structural transition of a semiflexible polymer should be interpreted at least on a two-dimensional phase space. The appearance of such large hysteresis is discussed in relation to different pathways in the loading and unloading processes. By using a minimal two-variable model, the hysteresis loop is described in terms of different pathways on the transition between two stable states.

Original languageEnglish
Pages (from-to)485-491
Number of pages7
JournalEuropean Physical Journal E
Volume17
Issue number4
DOIs
Publication statusPublished - 2005 Aug

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Chemistry(all)
  • Materials Science(all)
  • Surfaces and Interfaces

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