The break-up of free films pulled out of a pure liquid bath

硬胶体中大示踪粒子的主动与被动微流变学

Active and passive microrheology with large tracers in hard colloids

本研究通过朗之万动力学模拟和模式耦合理论（MCT）探讨了准硬胶体球浴中大示踪粒子的主动与被动微流变学，发现两者可通过线性响应理论关联，并揭示了示踪粒子扩散机制及浴中速度场衰减规律。

Continuous and discontinuous morphological transitions between capillary bridges on a beaded chain pulled out from a liquid

We describe theoretically and validate experimentally the mechanism of formation of capillary bridges during pulling a beaded chain out from a liquid with a planar surface. There are two types of capillary bridges present in this system, namely the sphere-planar liquid surface bridge initially formed between the spherical bead leaving the liquid bath and the original bulk planar liquid surface, and the sphere-sphere capillary bridge formed between neighbouring beads in the part of the chain above the liquid surface. During pulling the chain out of the liquid, the sphere-planar liquid surface b…

Active volatile drops on liquid baths

In most experimental studies, active drops propel in a liquid bulk due to self-generated interfacial stresses of solutal origin. Here, we demonstrate the self-propulsion of a volatile drop on the surface of a liquid bath due to stresses of thermal origin. Evaporative heat pumping is converted into directed motion driven by thermocapillary stresses, which emerge on the drop surface as a result of a symmetry breaking of the drop temperature field. The dependence of the drop speed on the activity source, i.e. the evaporation flux, is derived with scaling arguments and captures the experimental da…

主动浴中的被动粒子：我们如何判断它处于非平衡态？

Passive particle in an active bath: How can we tell it is out of equilibrium?

本文研究活性粒子流体中被动探针的非平衡诊断问题，发现仅凭探针轨迹无法识别非平衡特征，提出通过探针对微小扰动的响应违反第一涨落耗散定理来判定非平衡态。

polymer链断裂力与链长的非单调关系

Non-monotonic dependence of the rupture force in polymer chains on their lengths

我们考虑了均聚物链在恒定加载速率下一端被拉伸时的断裂动力学。我们的易碎聚合物模型与劳斯链有关，唯一的区别是单体之间的相互作用由Morse势而不是谐波势描述，因此允许机械故障。我们表明，在实验相关的域的参数的依赖性的最可能的断裂力的链长度可能是非单调的，使中等长度的链比短和长的更容易打破。提出了该效应的定性理论。

Self-propulsion of inverse Leidenfrost drops on a cryogenic bath

When deposited on a hot bath, volatile drops are observed to stay in levitation: the so-called Leidenfrost effect. Here, we discuss drop dynamics in an inverse Leidenfrost situation where room-temperature drops are deposited on a liquid nitrogen pool, and levitate on a vapor film generated by evaporation of the bath. In the seconds following deposition, we observe that the droplets start to glide on the bath along a straight path, only disrupted by elastic bouncing close to the edges of the container. Initially at rest, these self-propelled drops accelerate within a few seconds and reach veloc…