The coil–globule transition in self-avoiding active polymers,Soft Matter

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The coil–globule transition in self-avoiding active polymers
Soft Matter ( IF 2.9 ) Pub Date : 2020-10-13 , DOI: 10.1039/d0sm01526a
S. Das _{1,

2,

3,

4,

5} , N. Kennedy _{1,

2,

3,

4} , A. Cacciuto _{1,

2,

3,

4}

Affiliation

We perform numerical simulations of an active fully flexible self-avoiding polymer as a function of the quality of the embedding solvent described in terms of an effective monomer–monomer interaction. Specifically, by extracting the Flory exponent of the active polymer under different conditions, we are able to pin down the location of the coil–globule transition for different strengths of the active forces. Remarkably, we find that a simple rescaling of the temperature is capable of qualitatively capturing the dependence of the Θ-point of the polymer on the amplitude of active fluctuations. We discuss the limits of this mapping and suggest that a negative active pressure between the monomers, not unlike the one that has already been found in suspensions of active hard spheres, may also be present in active polymers.

中文翻译：

自回避活性聚合物中的线圈-小球过渡

我们根据有效的单体-单体相互作用描述了包埋溶剂质量的函数，对活性完全柔性的自规避聚合物进行了数值模拟。具体来说，通过在不同条件下提取活性聚合物的弗洛里指数，我们能够确定不同作用力强度下线圈-小球过渡的位置。值得注意的是，我们发现简单的温度换算可以定性地捕获Θ的依赖性。聚合物在主动波动幅度上的点。我们讨论了该映射的极限，并提出，与活性硬球悬浮液中已经发现的负压力不同，单体之间的负活性压力也可能存在于活性聚合物中。

更新日期：2020-11-09

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