Rigid flocks, undulatory gaits, and chiral foldamers in a chemically active polymer

IF 2.8 2区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY New Journal of Physics Pub Date : 2024-08-11 DOI:10.1088/1367-2630/ad6a7c
Arvin Gopal Subramaniam, Manoj Kumar, Shashi Thutupalli and Rajesh Singh
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Abstract

Active matter systems—such as a collection of active colloidal particles—operate far from equilibrium with complex inter-particle interactions that govern their collective dynamics. Predicting the collective dynamics of such systems may aid the design of self-shaping structures comprised of active colloidal units with a prescribed dynamical function. Here, using simulations and theory, we study the collective dynamics of a chain consisting of active Brownian particles with internal interactions via trail-mediated chemicals, connected by harmonic springs in two dimensions to obtain design principles for active colloidal molecules. We show that two-dimensional confinement and chemo-repulsive interactions between the freely-jointed particles lead to an emergent rigidity of the chain in the steady-state dynamics. In the chemo-attractive regime, the chain collapses into crystals that abruptly halt their motion. Further, in a chain consisting of a binary mixture of monomers, we show that non-reciprocal chemical affinities between distinct species give rise to novel phenomena, such as chiral molecules with tunable dynamics, sustained undulatory gaits and reversal of the direction of motion. Our results suggest a novel interpretation of the role of trail-mediated interactions, in addition to providing active self-assembly principles arising due to non-reciprocal interactions.
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化学活性聚合物中的刚性羊群、波状步态和手性折叠体
活性物质系统(如活性胶体粒子集合)的运行远离平衡状态,粒子间复杂的相互作用控制着它们的集体动力学。预测这类系统的集体动力学有助于设计由具有规定动力学功能的活性胶体单元组成的自我塑造结构。在这里,我们利用模拟和理论研究了由活性布朗粒子组成的链的集体动力学,这些粒子通过踪迹介导的化学物质进行内部相互作用,并在二维范围内通过谐波弹簧连接起来,从而获得活性胶体分子的设计原理。我们的研究表明,自由连接的粒子之间的二维约束和化学排斥相互作用导致链在稳态动力学中出现刚性。在化学吸引机制下,链会坍缩成晶体,并突然停止运动。此外,在由二元单体混合物组成的链中,我们发现不同物种之间的非互惠化学亲和力会产生新的现象,例如具有可调动态的手性分子、持续的起伏步态和运动方向的逆转。我们的研究结果为线索介导的相互作用的作用提供了一种新的解释,此外还提供了因非互惠相互作用而产生的主动自组装原理。
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来源期刊
New Journal of Physics
New Journal of Physics 物理-物理:综合
CiteScore
6.20
自引率
3.00%
发文量
504
审稿时长
3.1 months
期刊介绍: New Journal of Physics publishes across the whole of physics, encompassing pure, applied, theoretical and experimental research, as well as interdisciplinary topics where physics forms the central theme. All content is permanently free to read and the journal is funded by an article publication charge.
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