Electric-field-controlled diffusion of anisotropic particles: theory and experiment

Yuan, Tianyu; Yuan, Wuhan; Liu, Liping; Shan, Jerry W.

doi:10.1017/jfm.2021.653

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…This ability enables these organisms to engage in essential activities, such as locomotion in search of nourishment, orientation toward light, and the dissemination of their own species. At the mesoscopic scale, the mechanism behind self-propulsion has long been associated with either the infusion of external energy or The investigation of anisotropic particles has a rich history, driven by the intrinsic connection between particle shape and experimentally measurable properties [1][2][3][4][5][6][7][8][9]. Shape-asymmetric particles are prevalent in nature, varying in size from a few nanometers to a few micrometers.…”

Section: Introductionmentioning

confidence: 99%

Diffusion dynamics of an overdamped active ellipsoidal Brownian particle in two dimensions

Mandal,

Ghosh

2024

J. Stat. Mech.

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Shape asymmetry is the most abundant in nature and has attracted considerable interest in recent research. The phenomenon is widely recognized: a free ellipsoidal Brownian particle displays anisotropic diffusion during short time intervals, which subsequently transitions to an isotropic diffusion pattern over longer timescales. We have further expanded this concept to incorporate active ellipsoidal particles characterized by an initial self-propelled velocity. This paper provides analytical and simulation results of diffusion dynamics of an active ellipsoidal particle. The active ellipsoidal particle manifests three distinct regimes in its diffusion dynamics over time. In the transient regime, it displays diffusive behavior followed by a super-diffusive phase, and in the longer time duration, it transitions to purely diffusive dynamics. We investigated the diffusion dynamics of a free particle as well as a particle in a harmonic trap, and a particle subject to a constant field force. Moreover, we have studied the rotational diffusion dynamics and torque production resulting from an external constant force field. Furthermore, our investigation extends to the examination of the scaled average velocity of an ellipsoidal active particle, considering both a constant force field and a one-dimensional ratchet.

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