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Special Issue:
SPECIAL TOPIC — Active matters physics
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| SPECIAL TOPIC—Active matters physics |
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Phase separation and super diffusion of binary mixtures ofactive and passive particles |
| Yan Wang(王艳)1,2, Zhuanglin Shen(谌庄琳)2, Yiqi Xia(夏益祺)2, Guoqiang Feng(冯国强)2, Wende Tian(田文得)2,3 |
1 National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
2 Center for Soft Condensed Matter Physics&Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou 215006, China;
3 Department of Chemical Engineering, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States |
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Abstract Computer simulations were performed to study the dense mixtures of passive particles and active particles in two dimensions. Two systems with different kinds of passive particles (e.g., spherical particles and rod-like particles) were considered. At small active forces, the high-density and low-density regions emerge in both systems, indicating a phase separation. At higher active forces, the systems return to a homogeneous state with large fluctuation of particle area in contrast with the thermo-equilibrium state. Structurally, the rod-like particles accumulate loosely due to the shape anisotropy compared with the spherical particles at the high-density region. Moreover, there exists a positive correlation between Voronoi area and velocity of the particles. Additionally, a small number of active particles capably give rise to super-diffusion of passive particles in both systems when the self-propelled force is turned on.
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Received: 16 November 2019
Revised: 10 March 2020
Accepted manuscript online:
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PACS:
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31.15.at
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(Molecule transport characteristics; molecular dynamics; electronic structure of polymers)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 21674078, 21474074, 21574096, 21774091, and 21374073) and Overseas Research Program of Jiangsu, China (2019). |
Corresponding Authors:
Wende Tian
E-mail: tianwende@suda.edu.cn
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Cite this article:
Yan Wang(王艳), Zhuanglin Shen(谌庄琳), Yiqi Xia(夏益祺), Guoqiang Feng(冯国强), Wende Tian(田文得) Phase separation and super diffusion of binary mixtures ofactive and passive particles 2020 Chin. Phys. B 29 053103
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