Modular phoretic micro-swimmers: from individual minimal swimmers to multi-component schools

模块化泳动微型游泳者：从个人最小游泳者到多组件学校

• 批准号: 254833198
• 负责人: Professor Dr. Thomas Palberg
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/254833198?language=en
• 关键词: Modular; phoretic; micro; swimmers; individual

In this project we investigate modular phoretic micro-swimmers and closely related phenomena. Modular micro-swimmers self-organize spontaneously from inactive components and are capable of directed motion and cargo transport. Our modular approach allows for a flexible composition and optimization of components in order to improve overall performance. Using real space video-microscopy as main tool of investigation, experiments have so far been restricted to quasi 2D situations. We studied electro-osmotic pumping, minimal modular swimming and single component schooling to obtain and describe a rich phenomenology. These phenomena were investigated under systematic and controlled variation of experimental boundary conditions and the resulting behavior could be parameterized. This returned a solid quantitative data base for the development of qualitative models in close collaboration with several theoretical projects within this SPP. However, it also showed that further progress will afford an extension to a full 3D description of the motion of all components including the solvent. This shall be attempted in the second funding period. We will implement a three dimensional holographic tracking experiment and use it to continue and extend our investigations of swimming and schooling. This experiment will yield the full 3D solvent flows and thus facilitate a quantitative modeling of minimal swimming including advanced issues like downhill swimming. In addition, a number of interesting high flow situations will become accessible in great detail. These include multi-layered swarms and the formation of 3D convection structures in multi-component swarms. Moreover, 3D tracking of the solvent will strongly support the implementation of steering. As before, also high flow phenomena and novel swimmer types shall be comprehensively documented and systematically characterized. Based on these data the close collaboration with theory can be continued and extended to approach the overall goal of a refined quantitative understanding of modular phoretic micro-swimming and related phenomena.

在这个项目中，我们调查模块泳微型游泳者和密切相关的现象。模块化微型游泳者从非活动组件自发地自我组织，并且能够定向运动和货物运输。我们的模块化方法允许组件的灵活组合和优化，以提高整体性能。使用真实的空间视频显微镜作为主要的研究工具，实验迄今为止仅限于准二维的情况。我们研究了电渗透泵，最小模块游泳和单组分学校教育，以获得和描述一个丰富的现象。这些现象进行了研究下系统和控制的实验边界条件的变化，并由此产生的行为可以参数化。这返回了一个坚实的定量数据基础，定性模型的开发与本SPP内的几个理论项目密切合作。然而，它也表明，进一步的进展将提供一个完整的3D描述包括溶剂的所有组件的运动的扩展。在第二个供资期将尝试这样做。我们将实施一个三维全息跟踪实验，并利用它来继续和扩展我们对游泳和学校教育的调查。该实验将产生完整的3D溶剂流，从而促进最小游泳的定量建模，包括下坡游泳等高级问题。此外，一些有趣的高流量情况将变得非常详细。这些包括多层群和在多组分群中形成3D对流结构。此外，溶剂的3D跟踪将有力地支持转向的实施。如前所述，还应全面记录高流量现象和新型游泳者类型，并对其进行系统表征。基于这些数据，与理论的密切合作可以继续和扩展，以接近模块化电泳微游泳和相关现象的精确定量理解的总体目标。