Buxton Gavin A, Clarke Nigel
Department of Chemistry, University of Durham, Durham, DH1 3LE, United Kingdom.
Phys Rev Lett. 2007 Jun 8;98(23):238103. doi: 10.1103/PhysRevLett.98.238103. Epub 2007 Jun 7.
From polymer gels to cytoskeletal structures, random networks of elastic material are commonly found in both materials science and biology. We present a three-dimensional micromechanical model of these networks and identify a "bending-to-stretching" transition. We characterize this transition in terms of concentration scaling laws, the stored elastic energy, and affinity measurements. Understanding the relationship between microscopic geometry and macroscopic mechanics will elucidate, for example, the mechanical properties of polymer gel networks or the role of semiflexible network mechanics in cells.
从聚合物凝胶到细胞骨架结构，弹性材料的随机网络在材料科学和生物学中都很常见。我们提出了这些网络的三维微观力学模型，并确定了一种“弯曲到拉伸”的转变。我们根据浓度标度律、储存的弹性能和亲和力测量来表征这种转变。理解微观几何结构与宏观力学之间的关系，例如将阐明聚合物凝胶网络的力学性能或半柔性网络力学在细胞中的作用。
