Membrane curvature induced by polymer adsorption
Membrane curvature induced by polymer adsorption
复制标题
DOI：
10.1103/physreve.63.041910
复制
发表时间：
2001-04-01
影响因子：
2.4
通讯作者：
Sung, WY
中科院分区：
文献类型：
--
作者：
Kim, YW;Sung, WY
聚合物和膜之间的相互作用所产生的现象对生物应用提出了重要的问题。基于标度理论，我们研究了由柔性或半柔性链吸附引起的膜的自发曲率。不考虑链刚度，弱吸附的聚合物诱导膜弯曲远离聚合物（具有正曲率），主要是由于构象熵的增加相比，对于平坦表面。另一方面，强吸附的聚合物主要由于相互作用能的降低而诱导膜朝向聚合物弯曲，导致聚合物被膜包封的可能性。
The phenomena resulting from interaction between polymers and membranes pose important problems for biological applications. Based on a scaling theory, we investigate the spontaneous curvature of a membrane induced by either flexible or semiflexible chain adsorption. Irrespective of chain stiffness, a weakly adsorbed polymer induces the membrane to bend away (to have a positive curvature) from the polymer mostly due to increase of the conformational entropy compared with that for a flat surface. On the other hand, a strongly adsorbed polymer induces the membrane to bend toward the polymer mostly due to decrease in the interaction energy, leading to a possibility of encapsulation of polymer by the membrane.