Activity waves in binary active colloids of Quincke rollers

doi:10.1088/1674-1056/ae07ae

中国物理B ›› 2025, Vol. 34 ›› Issue (12): 126401-126401.doi: 10.1088/1674-1056/ae07ae

Activity waves in binary active colloids of Quincke rollers

Yuan Xie(谢圆)^†, Xiao-Yi Zhou(周晓怡)^†, Qi-Ying Ni(倪琦英)^†, Wen-De Tian(田文得)^‡, Kang Chen(陈康)^§, and Tian-Hui Zhang(张天辉)^¶

Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, China

收稿日期:2025-04-27 修回日期:2025-06-10 接受日期:2025-09-17 发布日期:2025-12-09
通讯作者: Wen-De Tian, Kang Chen, Tian-Hui Zhang E-mail:tianwende@suda.edu.cn;kangchen@suda.edu.cn;hangtianhui@suda.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11974255).

Activity waves in binary active colloids of Quincke rollers

Yuan Xie(谢圆)^†, Xiao-Yi Zhou(周晓怡)^†, Qi-Ying Ni(倪琦英)^†, Wen-De Tian(田文得)^‡, Kang Chen(陈康)^§, and Tian-Hui Zhang(张天辉)^¶

Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, China

Received:2025-04-27 Revised:2025-06-10 Accepted:2025-09-17 Published:2025-12-09
Contact: Wen-De Tian, Kang Chen, Tian-Hui Zhang E-mail:tianwende@suda.edu.cn;kangchen@suda.edu.cn;hangtianhui@suda.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11974255).

1. 2025-126401-SI.zip(26312KB)

摘要/Abstract

摘要： Activity waves are popular in excitable systems. Here, we show that binary active colloids of Quincke rollers driven by an alternating electric field can also form activity waves. In the activity waves, Quincke rollers exhibit a memory of the direction of motion. This memory occurs at frequencies much smaller than that in monodisperse systems. It is found that the enhanced memory arises from the paired distinct rollers which break the dynamic symmetry because of the configuration-dependent dipole-dipole interactions. This finding demonstrates that dipole-dipole interactions between distinct active agents can significantly modify the collective dynamics of polydisperse active systems.

关键词: polydisperse active systems, activity waves, dipole-dipole interactions

Abstract: Activity waves are popular in excitable systems. Here, we show that binary active colloids of Quincke rollers driven by an alternating electric field can also form activity waves. In the activity waves, Quincke rollers exhibit a memory of the direction of motion. This memory occurs at frequencies much smaller than that in monodisperse systems. It is found that the enhanced memory arises from the paired distinct rollers which break the dynamic symmetry because of the configuration-dependent dipole-dipole interactions. This finding demonstrates that dipole-dipole interactions between distinct active agents can significantly modify the collective dynamics of polydisperse active systems.

Key words: polydisperse active systems, activity waves, dipole-dipole interactions

中图分类号: (General studies of phase transitions)

64.60.-i

05.65.+b (Self-organized systems) 87.18.Gh (Cell-cell communication; collective behavior of motile cells) 82.70.Dd (Colloids)

Yuan Xie(谢圆), Xiao-Yi Zhou(周晓怡), Qi-Ying Ni(倪琦英), Wen-De Tian(田文得), Kang Chen(陈康), and Tian-Hui Zhang(张天辉). Activity waves in binary active colloids of Quincke rollers[J]. 中国物理B, 2025, 34(12): 126401-126401.

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Activity waves in binary active colloids of Quincke rollers

Activity waves in binary active colloids of Quincke rollers

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