气候变化领域集成服务门户(CCPortal): Tunable corrugated patterns in an active nematic sheet

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DOI	10.1073/pnas.1912223116
	Tunable corrugated patterns in an active nematic sheet
	Senoussi A.; Kashida S.; Voituriez R.; Galas J.-C.; Maitra A.; Estevez-Torres A.
发表日期	2019
ISSN	0027-8424
起始页码	22464
结束页码	22470
卷号	116 期号:45
英文摘要	Active matter locally converts chemical energy into mechanical work and, for this reason, it provides new mechanisms of pattern formation. In particular, active nematic fluids made of protein motors and filaments are far-from-equilibrium systems that may exhibit spontaneous motion, leading to actively driven spatiotemporally chaotic states in 2 and 3 dimensions and coherent flows in 3 dimensions (3D). Although these dynamic flows reveal a characteristic length scale resulting from the interplay between active forcing and passive restoring forces, the observation of static and large-scale spatial patterns in active nematic fluids has remained elusive. In this work, we demonstrate that a 3D solution of kinesin motors and microtubule filaments spontaneously forms a 2D free-standing nematic active sheet that actively buckles out of plane into a centimeter-sized periodic corrugated sheet that is stable for several days at low activity. Importantly, the nematic orientational field does not display topological defects in the corrugated state and the wavelength and stability of the corrugations are controlled by the motor concentration, in agreement with a hydrodynamic theory. At higher activities these patterns are transient and chaotic flows are observed at longer times. Our results underline the importance of both passive and active forces in shaping active matter and demonstrate that a spontaneously flowing active fluid can be sculpted into a static material through an active mechanism. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Active matter; Liquid crystals; Pattern formation; Self-organization
语种	英语
scopus关键词	kinesin; Article; chemical analysis; concentration (parameter); crystal structure; flow kinetics; hydrodynamics; image analysis; liquid crystal; membrane structure; microfilament; microtubule; molecular dynamics; molecular interaction; molecular size; priority journal; three dimensional imaging
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160334
作者单位	Senoussi, A., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France; Kashida, S., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France; Voituriez, R., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France, Laboratoire de Physique Théorique de la Matière Condensée, Sorbonne Université and CNRS, Paris, F-75005, France; Galas, J.-C., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France; Maitra, A., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France; Estevez-Torres, A., Laboratoire Jean Perrin, Sorbonne Université and CNRS, Paris, F-75005, France
推荐引用方式 GB/T 7714	Senoussi A.,Kashida S.,Voituriez R.,et al. Tunable corrugated patterns in an active nematic sheet[J],2019,116(45).
APA	Senoussi A.,Kashida S.,Voituriez R.,Galas J.-C.,Maitra A.,&Estevez-Torres A..(2019).Tunable corrugated patterns in an active nematic sheet.Proceedings of the National Academy of Sciences of the United States of America,116(45).
MLA	Senoussi A.,et al."Tunable corrugated patterns in an active nematic sheet".Proceedings of the National Academy of Sciences of the United States of America 116.45(2019).