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(Seminar) Active matter: a world far from equilibrium - thermodynamics, pattern formation, and complex environments
11/11
2020
- Title (Seminar) Active matter: a world far from equilibrium - thermodynamics, pattern formation, and complex environments
- Speaker
- Date
- Venue
Abstract
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CAS Key Laboratory of Theoretical Physics | ||
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Institute of Theoretical Physics | ||
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Chinese Academy of Sciences | ||
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Seminar | ||
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Title 题目 |
Active matter: a world far from equilibrium - thermodynamics, pattern formation, and complex environments | |
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Speaker 报告人 |
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Affiliation 所在单位 |
上海交通大学 自然科学研究院 | |
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Date 日期 |
2020年11月11日（周三）下午4：00 | |
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Venue 地点 |
腾讯会议：943 958 694 | |
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Contact Person 所内联系人 |
雷泽 | |
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Abstract 摘要 |
Active matter, such as run-and-tumble bacteria, is a system with microscopic injection and dissipation of energy. It is a common non-equilibrium system in nature, which exhibits a lot of new physics outside the equilibrium world. In this talk, I will talk about my several recent work on active matter, especially bacterial systems. I will start with the surface tension in active systems: if there exists an equation of state of surface tension and how to measure it. It opens the way towards the generalized thermodynamics of active systems. [1] Then I will talk about how to engineer two strains of E. coli to form different patterns from reciprocal interactions. [2] To confirm the bacteria behaves as we engineered, we developed a high-throughput method, differential dynamic microscopy, to relate directly the kinetic parameters of bacteria with its molecular property. [3] Finally, I will talk about how the complex environment, such as semi-solid agar gel, alters the expansion of the bacteria colony. References: [1] R. Zakine, Y. Zhao, M. Knezevic, A. Daerr, Y. Kafri, J. Tailleur, F. van Wijland, "Surface Tensions between Active Fluids and Solid Interfaces: Bare vs Dressed", Physical Review Letters 124, 248003 (2020). [2] A. I. Curatolo, N. Zhou, Y. Zhao, C. Liu, A. Daerr, J. Tailleur, J.-D. Huang, "Cooperative pattern formation in multi-species bacterial colonies", Nature Physics (2020). [3] C. Kurzthaler, Y. Zhao, N. Zhou, J. Schwarz-Linek, C. Devailly, J. Arlt, J. Huang, W. C. K. Poon, T. Franosch, J.Tailleur, V. A. Martinez, "Quantitative characterization of the run-and-tumble dynamics of Escherichia coli", unpublished. | |