Elastic properties of polymer-decorated membranes
Elastic properties of polymer-decorated membranes
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DOI：
10.1051/jp2:1996142
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发表时间：
1996-10-01
期刊：
影响因子：
--
通讯作者：
Lipowsky, R
中科院分区：
文献类型：
--
作者：
Hiergeist, C;Lipowsky, R
附着在流体膜一侧的聚合物引起膜的自发曲率M（sp）并改变其弹性常数。对于一个理想的聚合物在蘑菇政权，我们确定M（sp）和弹性常数kappa和kappa（G）通过一个明确的计算的熵增益的聚合物锚定到曲面上。对于刷状体系中的锚定聚合物，使用缩放图片来确定M（sp），其随覆盖率单调增加。对于小和大，分别具有类似于N-2（13/6）的M（sp）和类似于N-1/7（13/21）的M（sp）。无论是在蘑菇和刷政权，聚合物的抗弯刚度增加，而高斯抗弯刚度降低。
Polymers attached to one side of a fluid membrane induce a spontaneous curvature M(sp) of the membrane and change its elastic constants. For an ideal polymer in the mushroom regime, we determine M(sp) and the elastic constants kappa and kappa(G) by an explicit calculation of the entropy gain of a polymer anchored onto a curved surface. For anchored polymers in the brush regime, a scaling picture is used to determine M(sp) which increases monotonically with the coverage . For small and large , one has M(sp) similar to N-2(13/6) and M(sp) similar to N-1/7(13/21), respectively. Both in the mushroom and in the brush regime, the polymers increase the bending rigidity, whereas the Gaussian bending rigidity is decreased.