论文标题
主动和被动浴中的聚合物链配置
Polymer-Chain Configurations in Active and Passive Baths
论文作者
论文摘要
嵌入过平衡浴中的聚合物所采用的构型在各种生物系统中可能具有广泛的影响。因此，它们引起了极大的兴趣，尤其是在模拟研究中。在这里，我们分析了一个被动柔性链在坚硬，自旋转，振动的磁盘浴中采取的配置的分布，并将其系统地比较它与硬，热，振动的磁盘的浴缸中的相同柔性链的分布。我们在实验上证明了这两个链条遵守弗洛里定律的平均长度和平均半径。但是，与相关单体数量相关的KUHN长度在活动浴中较小，对应于较高的有效温度。重要的是，活动浴不仅仅是在热平衡浴场上绘制。对链的配置的仔细检查表明有明显的偏见，而在活动浴中的链条更有可能具有单个突出弯曲的配置。
The configurations taken by polymers embedded in out-of-equilibrium baths may have broad effects in a variety of biological systems. As such, they have attracted considerable interest, particularly in simulation studies. Here we analyze the distribution of configurations taken by a passive flexible chain in a bath of hard, self-propelled, vibrated disks and systematically compare it to that of the same flexible chain in a bath of hard, thermal-like, vibrated disks. We demonstrate experimentally that the mean length and mean radius of gyration of both chains obey Flory's Law. However, the Kuhn length associated with the number of correlated monomers is smaller in the case of the active bath, corresponding to a higher effective temperature. Importantly, the active bath does not just simply map on a hot equilibrium bath. Close examination of the chains' configurations indicates a marked bias, with the chain in the active bath more likely assuming configurations with a single prominent bend.
