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An attraction-repulsion transition of force on two asymmetric wedges induced by active particles.

ABSTRACT: Effective interaction between two asymmetric wedges immersed in a two-dimensional active bath is investigated by computer simulations. The attraction-repulsion transition of effective force between two asymmetric wedges is subjected to the relative position of two wedges, the wedge-to-wedge distance, the active particle density, as well as the apex angle of two wedges. By exchanging the position of the two asymmetric wedges in an active bath, firstly a simple attraction-repulsion transition of effective force occurs, completely different from passive Brownian particles. Secondly the transition of effective force is symmetric for the long-range distance between two asymmetric wedges, while it is asymmetric for the short-range case. Our investigations may provide new possibilities to govern the motion and assembly of microscopic objects by taking advantage of the self-driven behaviour of active particles.

SUBMITTER: Li K

PROVIDER: S-EPMC7367348 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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An attraction-repulsion transition of force on two asymmetric wedges induced by active particles.

Li Ke K Guo Fuchen F Zhou Xiaolin X Wang Xianghong X He Linli L Zhang Linxi L

Scientific reports 20200716 1

Effective interaction between two asymmetric wedges immersed in a two-dimensional active bath is investigated by computer simulations. The attraction-repulsion transition of effective force between two asymmetric wedges is subjected to the relative position of two wedges, the wedge-to-wedge distance, the active particle density, as well as the apex angle of two wedges. By exchanging the position of the two asymmetric wedges in an active bath, firstly a simple attraction-repulsion transition of e ...[more]

PMID: 32678189

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