Stretching instability of intrinsically curved semiflexible biopolymers:A lattice model approach

• 作者: 周子聪 林方庭 陈柏翰
• 来源期刊: 中国物理B（英文版）
• 关键词: semifl exible biopolymer intrinsic curvature mechanical property phase transition
• 年，卷（期）: 2015,（2）
• 页码范围: 028701-1-028701-7
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/028701

摘要

We apply Monte Carlo simulation method to lattice systems to study the effect of an intrinsic curvature on the me-chanical property of a semifl exible biopolymer. We find that when the intrinsic curvature is sufficient large, the extension of a semifl exible biopolymer can undergo a first-order transition at finite temperature. The critical force increases with in-creasing intrinsic curvature. But the relationship between the critical force and the bending rigidity is structure-dependent. In triangle lattice system, when the intrinsic curvature is smaller than a critical value, the critical force increases with the increasing bending rigidity first, and then decreases with the increasing bending rigidity. But in square lattice system, the critical force always decreases with the increasing bending rigidity. In contrast, when the intrinsic curvature is greater than the critical value, the larger bending rigidity always results in a larger critical force in both lattice systems.