标题： 偶极自相互作用驱动聚合物链坍缩 显示英文标题

标题： Dipolar Self-Interactions Drive Polymer Chain Collapse

摘要： 我们报告称，当介电聚合物链两端被约束时，在高电场作用下会急剧坍塌。 该链的坍塌是由非局部偶极相互作用和单体的各向异性极化驱动的，这是真实聚合物的一个特征，而之前理论无法纳入这一特性。 一旦坍塌，大量链单体会在链端之间的中心位置聚集，使局部电场和极化程度增加几个数量级。 链的坍塌对施加电场的方向和链的拉伸敏感。 我们的研究不仅为快速致动和传感提供了新方法，还为发现介电聚合物中不稳定性及电气击穿背后的临界物理机制提供了途径。 显示英文摘要

摘要： We report that a dielectric polymer chain, constrained at both ends, sharply collapses when exposed to a high electric field. The chain collapse is driven by nonlocal dipolar interactions and anisotropic polarization of monomers, a characteristic of real polymers that prior theories were unable to incorporate. Once collapsed, a large number of chain monomers accumulate at the center location between the chain ends, locally increasing the electric field and polarization by orders of magnitude. The chain collapse is sensitive to the orientation of the applied electric field and chain stretch. Our findings not only offer new ways for rapid actuation and sensing but also provide a pathway to discover the critical physics behind instabilities and electrical breakdown in dielectric polymers.