Boids in a Loop: Self-Propelled particles within a Flexible Boundary

活性环从吸引表面的逃逸：表现得如同自驱动布朗粒子

Escape of an Active Ring from an Attractive Surface: Behaving Like a Self-Propelled Brownian Particle

本研究通过布朗动力学模拟探究柔性活性环从吸引表面的逃逸行为，发现两种逃逸机制，揭示活性、持续时间、势垒形状及推进力偏置对逃逸的影响，证明该体系可等效为自驱动布朗粒子模型。

柔性线性极性聚合物的活性增强剪切变稀

Activity-enhanced shear thinning of flexible linear polar polymers

本研究通过模拟与解析对比，发现极性活性显著增强柔性聚合物在剪切流中的拉伸、收缩及剪切变稀行为，且该效应由活性决定，高活性下趋于饱和，高剪切下回归被动行为。

Active vs. Passive Hard Disks Against a Membrane : Mechanical Pressure and Instability

We experimentally study the mechanical pressure exerted by a set of respectively passive isotropic and self-propelled polar disks onto two different flexible unidimensional membranes. In the case of the isotropic disks, the mechanical pressure, inferred from the shape of the membrane, is identical for both membranes and follows the equilibrium equation of state for hard disks. On the contrary, for the self-propelled disks, the mechanical pressure strongly depends on the membrane in use, and is thus not a state variable. When self propelled disks are present on both sides of the membrane, we ob…

自驱动半柔性丝状体的集体动力学

Collective Dynamics of Self-propelled Semiflexible Filaments

本文利用自驱动蠕虫状链模型研究半柔性丝状体的集体动力学，发现通过调节弯曲刚度、活性和长径比可诱导出包括螺旋相、团簇相和活性湍流等多种非平衡相态，为组织活性物质提供了可调稳态参考。

屈曲驱动的弹性主动结构的涌现智能

Emergent intelligence of buckling-driven elasto-active structures

本文提出由两个自驱动微型机器人和弹性梁构成的屈曲驱动弹性主动结构，利用非线性弹性实现定向运动、边界响应与迷宫导航等涌现智能。

在声流控装置中根据运动能力选择活性物质：自推进颗粒与精子细胞

Selecting active matter according to motility in an acoustofluidic setup: Self-propelled particles and sperm cells

本文提出一种利用可调谐声流控陷阱按运动能力分选活性物质的新方法，高运动能力个体可逃逸，并通过模拟、自推进 Janus 颗粒和人类精子实验验证，可用于辅助生殖及其他活性系统分选。

柔性自催化丝的不稳定性与自推进

Instability and self-propulsion of flexible autophoretic filaments

研究探讨了具有均匀表面化学性质的直弹性丝在粘性流体中通过屈曲不稳定性实现自推进的机制，揭示了其在不同柔韧性下的非线性动力学行为及多种游动模式。

How does a flexible chain of active particles swell?

We study the swelling of a flexible linear chain composed of active particles by analytical theory and computer simulation. Three different situations are considered: a free chain, a chain confined to an external harmonic trap, and a chain dragged at one end. First we consider an ideal chain with harmonic springs and no excluded volume between the monomers. The Rouse model of polymers is generalized to the case of self-propelled monomers and solved analytically. The swelling, as characterized by the spatial extension of the chain, scales with the monomer number defining a Flory exponent $ν$ wh…

Activated barrier crossing dynamics of a Janus particle carrying cargo

We numerically study the escape kinetics of a self-propelled Janus particle, carrying a cargo, from a meta-stable state. We assume that the cargo is attached to the Janus particle by a flexible harmonic spring. We take into account the effect of velocity field, created in the fluid due to movements of dimer's components, by considering space-dependent diffusion tensor (Oseen tensor). Our simulation results show that the synchronization between barrier crossing events and rotational relaxation process can enhance escape rate to a large extent. Also, the load carrying capability of a Janus parti…

Distinct impacts of polar and nematic self-propulsion on active unjamming

Though jamming transitions are long studied in condensed matter physics and granular systems, much less is known about active jamming (or unjamming), which commonly takes place in living materials. In this paper, we explore, by molecular dynamic simulations, the jamming-unjamming transition in a dense system of active semi-flexible filaments. In particular we characterise the distinct impact of polar versus nematic driving for different filament rigidity and at varying density. Our results show that high densities of dynamic active filaments can be achieved by only changing the nature of the a…

ActiveCheerios：界面处由3D打印的Marangoni驱动活性粒子

ActiveCheerios: 3D-Printed Marangoni-Driven Active Particles at an Interface

本文提出利用3D打印制造由Marangoni效应推进、Cheerios效应调控相互作用的界面活性粒子，通过可调运动性和模块化设计实现平移、手性运动及自组装，为活性界面系统提供了灵活低成本的开发平台。