Active Brownian motion in a narrow channel

Ao, Xue; Ghosh, Parthasarathi; Li, Y.; Schmid, Gerhard; Hänggi, Peter; Marchesoni, F.

doi:10.1140/epjst/e2014-02329-1

Cited by 69 publications

(52 citation statements)

References 52 publications

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“…The simplest and, possibly, best established model of self-propulsion is encoded by the Langevin equations [9][10][11][12] x = v 0 cos φ + D 0 ξ x (t),ẏ = v 0 sin φ + D 0 ξ y (t),…”

Section: Introductionmentioning

confidence: 99%

Pseudochemotactic drifts of artificial microswimmers

Ghosh

Marchesoni

et al. 2015

Phys. Rev. E

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We numerically investigate the motion of active artificial microswimmers diffusing in a fuel concentration gradient. We observe that, in the steady state, their probability density accumulates in the low-concentration regions, whereas a tagged swimmer drifts with velocity depending in modulus and orientation on how the concentration gradient affects the self-propulsion mechanism. Under most experimentally accessible conditions, the particle drifts toward the high-concentration regions (pseudo-chemotactic drift). A correct interpretation of experimental data must account for such an "anti-Fickian" behavior.

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“…The simplest and, possibly, best established model of self-propulsion is encoded by the Langevin equations [9][10][11][12] x = v 0 cos φ + D 0 ξ x (t),ẏ = v 0 sin φ + D 0 ξ y (t),…”

Section: Introductionmentioning

confidence: 99%

Pseudochemotactic drifts of artificial microswimmers

Ghosh

Marchesoni

et al. 2015

Phys. Rev. E

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“…Because of the nonequilibrium nature of active particles, local asymmetries in the environment can be leveraged to create a drift; these particles have been demonstrated to perform chemotaxis [33,34], durotaxis [35], and phototaxis [36]. Furthermore, topographical cues, such as those obtained in the presence of arrays of asymmetric posts [37,38] and ratchets consisting of asymmetric potentials [39][40][41] or asymmetric channels [42][43][44][45], have been shown to produce a directional bias in the motion of active particles reminiscent of those observed for cells.…”

Section: Introductionmentioning

confidence: 99%

Topotaxis of active Brownian particles

et al. 2020

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Recent experimental studies have demonstrated that cellular motion can be directed by topographical gradients, such as those resulting from spatial variations in the features of a micropatterned substrate. This phenomenon, known as topotaxis, is especially prominent among cells persistently crawling within a spatially varying distribution of cell-sized obstacles. In this article we introduce a toy model of topotaxis based on active Brownian particles constrained to move in a lattice of obstacles, with space-dependent lattice spacing. Using numerical simulations and analytical arguments, we demonstrate that topographical gradients introduce a spatial modulation of the particles' persistence, leading to directed motion toward regions of higher persistence. Our results demonstrate that persistent motion alone is sufficient to drive topotaxis and could serve as a starting point for more detailed studies on self-propelled particles and cells. arXiv:1908.06078v1 [cond-mat.soft]

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“…The problem of rectifying motion in random environments is a long-standing issue, which has many theoretical and practical implications [37,38]. Active matter can be rectified on the asymmetric substrates without external driving, which may open a wealth of possibilities such as cargo transport, sorting, or micromachine construction [39][40][41][42][43][44][45]. Rectification of active matter confined to a surface has been mainly studied on planar surfaces.…”

Section: Introductionmentioning

confidence: 99%

Collective transport of polar active particles on the surface of a corrugated tube

Zhu

Liao

2019

New J. Phys.

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We study collective transport of polar active particles on the surface of a corrugated tube. Particles can be rectified on the surface of the asymmetric tube. The system shows different motion patterns which are determined by the competition between alignment strength and rotational diffusion. For a given alignment strength, there exist transitions from the circulating band state to the travelling state, and finally to the disordered state when continuously changing rotational diffusion. The circulating band is a purely curvature-driven effect with no equivalent in the planar model. The rectification is greatly improved in the travelling state and greatly suppressed in the circulating band state. There exist optimal parameters (modulation amplitude, alignment strength, rotational diffusion, and selfpropulsion speed) at which the rectified efficiency takes its maximal value. Remarkably, in the travelling state, we can observe current reversals by changing translational diffusion.

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Active Brownian motion in a narrow channel

Cited by 69 publications

References 52 publications

Pseudochemotactic drifts of artificial microswimmers

Pseudochemotactic drifts of artificial microswimmers

Topotaxis of active Brownian particles

Collective transport of polar active particles on the surface of a corrugated tube

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