Escape dynamics of a self-propelled nanorod from circular confinements with narrow openings
arXiv:2307.05460 · doi:10.1039/D3SM00723E
Abstract
We perform computer simulations to explore the escape dynamics of a self-propelled (active) nanorod from circular confinements with narrow opening(s). Our results clearly demonstrate how the persistent and directed motion of the nanorod helps it to escape. Such escape events are absent if the nanorod is passive. To quantify the escape dynamics, we compute the radial probability density function (RPDF) and mean first escape time (MFET) and show how the activity is responsible for the bimodality of RPDF, which is clearly absent if the nanorod is passive. The broadening of displacement distributions with activity has also been observed. The computed mean first escape time decreases with activity. In contrast, the fluctuations of the first escape times vary in a non-monotonic way. This results high values of the coefficient of variation and indicates the presence of multiple timescales in first escape time distributions and multimodality in uniformity index distributions. We hope our study will help in differentiating activity-driven escape dynamics from purely thermal passive diffusion in confinement.
References in corpus (22)
- Self-motile colloidal particles: from directed propulsion to random walk
- Artificial Brownian motors: Controlling transport on the nanoscale
- Swarming and swirling in self-propelled polar granular rods
- Diffusive escape through a narrow opening: new insights into a classic problem
- Full distribution of first exit times in the narrow escape problem
- Stochastic timing in gene expression for simple regulatory strategies
- Active Brownian particles and run-and-tumble particles separate inside a maze
- Escape of a passive particle from activity-induced energy landscape: Emergence of slow and fast effective diffusion
- Escape Kinetics of Self-Propelled Janus Particles from a Cavity: Numerical Simulations
- Geometric stochastic resonance in a double cavity
- Transport of active particles in an open-wedge channel
- Geometric effects induce anomalous size-dependent active transport in structured environments
- Narrow-escape time and sorting of active particles in circular domains
- First passage of a diffusing particle under stochastic resetting in bounded domains with spherical symmetry
- Migration of Active Rings in Porous Media
- Active Dynamics of Linear Chains and Rings in Porous Media
- The escape problem for active particles confined to a disc
- Dynamics of self-propelled tracer particles inside a polymer network
- Chemically symmetric and asymmetric self-driven rigid dumbbells in 2D polymer gel
- Escape dynamics of confined undulating worms
- Active Particle Diffusion in Convection Roll Arrays
- Escape Kinetics of an Underdamped Colloidal Particle from a Cavity through Narrow Pores