极性二嵌段活性聚合物中自发成结现象的激增
Upsurge of spontaneous knotting in polar diblock active polymers
AI总结：
本研究发现含自驱动单体的二嵌段活性聚合物的成结概率与复杂度会大幅提升，且该效应随单体占比呈非单调变化，揭示了成结与结寿命的竞争机制，为纳米尺度制备缠结长丝提供了非平衡新方法。
摘要：
长链聚合物在平衡态下自发形成结是不可避免的，但在足够短的链中这种情况会变得罕见。本研究表明，在含有占比为$p$的自驱动单体的二嵌段聚合物中，成结现象及结的复杂度会提升数个数量级。值得注意的是，这种增强效应并非随$p$单调变化，存在一个与单体活性无关的最优占比值。通过监测结的尺寸和位置，我们阐明了结的形成、扩散和解开的机制，并将这种非单调行为归因于成结速率与结的寿命之间的竞争。这些发现提出了一种在纳米尺度生成缠结长丝的非平衡机制。
英文摘要：
Spontaneous formation of knots in long polymers at equilibrium is inevitable but becomes rare in sufficiently short chains. Here, we show that knotting and knot complexity increase by orders of magnitude in diblock polymers with a fraction $p$ of self-propelled monomers. Remarkably, this enhancement is not monotonic in $p$ with an optimal value independent of the monomer's activity. By monitoring the knot's size and position we elucidate the mechanisms of its formation, diffusion, and untying and ascribe the non-monotonic behaviour to the competition between the rate of knot formation and the knot's lifetime. These findings suggest a non-equilibrium mechanism to generate entangled filaments at the nano-scale.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
