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arXiv 2103.07335cond-mat.soft
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一维环境中活动诱导的微游泳者相互作用与合作

Activity-induced microswimmer interactions and cooperation in one-dimensional environments

Stefania Ketzetzi, Melissa Rinaldin, Pim Dröge, Joost de Graaf, Daniela J. Kraft

发表信息：
Nature Communications 13, 1772 (2022)
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摘要：

生物微泳者的合作运动对它们的生存至关重要，因为它有助于粘附到表面，形成分层菌落，有效的运动，并增强对营养物质的获取。合成微型游泳者目前缺乏源于活动诱导的相互作用的真正合作行为。在这里，我们证明了催化microswimmer沿一维路径表现出各种合作行为。我们发现，他们的速度随着游泳者的数量增加，而活动诱导游泳者之间的首选距离。使用一个极小模型，我们归因于这种行为的一个有效的活性诱导的潜力，源于化学和流体动力学耦合之间的竞争。这些相互作用进一步诱导主动自组装成火车以及紧凑的链，可以伸长，断裂，变得固定和重新动员。我们确定的关键作用，环境形态和游泳者的方向性发挥这些高度动态的链行为。这些活动引起的相互作用打开了大门，利用合作，以提高效率，以及提供时间和空间控制，微型游泳运动，从而使他们能够执行复杂的任务内复杂的环境。

英文摘要：

Cooperative motion in biological microswimmers is crucial for their survival as it facilitates adhesion to surfaces, formation of hierarchical colonies, efficient motion, and enhanced access to nutrients. Synthetic microswimmers currently lack truly cooperative behavior that originates from activity-induced interactions. Here, we demonstrate that catalytic microswimmers show a variety of cooperative behaviors along one-dimensional paths. We show that their speed increases with the number of swimmers, while the activity induces a preferred distance between swimmers. Using a minimal model, we ascribe this behavior to an effective activity-induced potential that stems from a competition between chemical and hydrodynamic coupling. These interactions further induce active self-assembly into trains as well as compact chains that can elongate, break-up, become immobilized and remobilized. We identify the crucial role that environment morphology and swimmer directionality play on these highly dynamic chain behaviors. These activity-induced interactions open the door towards exploiting cooperation for increasing the efficiency of, as well as provide temporal and spatial control over, microswimmer motion, thereby enabling them to perform intricate tasks inside complex environments.

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。

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