Semiflexible polymer condensates in poor solvents: toroid versus spherical geometries.
Semiflexible polymer condensates in poor solvents: toroid versus spherical geometries.
复制标题
不良溶剂中的半柔性聚合物缩合物：环形与球形几何形状。
DOI：
10.1103/physreve.71.031802
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
David Williams
中科院分区：
文献类型：
--
作者：
I. Miller;M. Keentok;Gerald G. Pereira;David Williams
半柔性聚合物，例如 DNA，在存在冷凝剂的情况下通常会形成环形线圈。这是由于弯曲和表面积自由能损失之间的平衡。在这里，我们展示了为什么在实验中发现所有环形线圈都具有相似的物理尺寸。我们还引入了一种新颖的形态，即空心球的形态，它有利于长聚合物链。这提供了将材料封装在由半柔性聚合物制成的“囊泡”内的可能性。我们还考虑了许多此类聚合物链置于不良溶剂中的情况。我们展示了两种形态之间的转变发生在聚合物链浓度增加时，从加厚的环形到球形小球。
Semiflexible polymers, such as DNA, in the presence of a condensing agent often form toroids. This is due to a balance between bending and surface area free energy penalties. Here we show why in experiments all the toroids have been found to have similar physical size. We also introduce a novel morphology, that of the hollow sphere, which is favored for long polymer chains. This offers the possibility of encapsulating material inside a "vesicle" made of semiflexible polymers. We also consider the case of many such polymer chains placed in a poor solvent. We show a transition between two morphologies occur on increasing concentration of polymer chains, from a thickened toroid to a spherical globule.
DOI：
10.1073/pnas.92.8.3581
发表时间：
1995-04-11
影响因子：
11.1
作者：
HUD, NV;DOWNING, KH;BALHORN, R
通讯作者：
BALHORN, R