Tunable Memory and Activity of Quincke Particles in Micellar Fluid

被引:1
|
作者
Yang, Yang [1 ,2 ]
Zhang, Meng Fei [1 ,2 ]
Zhu, Lailai [3 ]
Zhang, Tian Hui [1 ,2 ]
机构
[1] Soochow Univ, Ctr Soft Condensed Matter Phys & Interdisciplinary, Suzhou 215006, Peoples R China
[2] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
[3] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
基金
中国国家自然科学基金;
关键词
POLAR;
D O I
10.1088/0256-307X/40/12/126401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Memory can remarkably modify the collective behavior of active particles. We show that, in a micellar fluid, Quincke particles driven by a square-wave electric field exhibit a frequency-dependent memory. Upon increasing the frequency, a memory of directions emerges, whereas the activity of particles decreases. As the activity is dominated by interaction, Quincke particles aggregate and form dense clusters, in which the memory of the direction is further enhanced due to the stronger electric interactions. The density-dependent memory and activity result in dynamic heterogeneity in flocking and offer a new opportunity for research of collective motions.
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页数:6
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