Activity-assisted barrier crossing of self-propelled colloids over parallel microgrooves

Yan Wen; Zhihao Li; Haiqin Wang; Jing Zheng; Jinyao Tang; Pik-Yin Lai; Xinpeng Xu; Penger Tong

doi:10.1103/physreve.107.l032601

Activity-assisted barrier crossing of self-propelled colloids over parallel microgrooves

Yan Wen, Zhihao Li, Haiqin Wang, Jing Zheng, Jinyao Tang, Pik-Yin Lai^*, Xinpeng Xu^*, Penger Tong^*

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We report a systematic study of the dynamics of self-propelled particles (SPPs) over a one-dimensional periodic potential landscape U0(x), which is fabricated on a microgroove-patterned polydimethylsiloxane (PDMS) substrate. From the measured nonequilibrium probability density function P(x;F0) of the SPPs, we find that the escape dynamics of the slow rotating SPPs across the potential landscape can be described by an effective potential Ueff(x;F0), once the self-propulsion force F0 is included into the potential under the fixed angle approximation. This work demonstrates that the parallel microgrooves provide a versatile platform for a quantitative understanding of the interplay among the self-propulsion force F0, spatial confinement by U0(x), and thermal noise, as well as its effects on activity-assisted escape dynamics and transport of the SPPs.

Original language	English
Article number	L032601
Journal	Physical Review E
Volume	107
Issue number	3
DOIs	https://doi.org/10.1103/physreve.107.l032601 https://doi.org/10.1103/PhysRevE.107.L032601
State	Published - Mar 2023

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title = "Activity-assisted barrier crossing of self-propelled colloids over parallel microgrooves",

abstract = "We report a systematic study of the dynamics of self-propelled particles (SPPs) over a one-dimensional periodic potential landscape U0(x), which is fabricated on a microgroove-patterned polydimethylsiloxane (PDMS) substrate. From the measured nonequilibrium probability density function P(x;F0) of the SPPs, we find that the escape dynamics of the slow rotating SPPs across the potential landscape can be described by an effective potential Ueff(x;F0), once the self-propulsion force F0 is included into the potential under the fixed angle approximation. This work demonstrates that the parallel microgrooves provide a versatile platform for a quantitative understanding of the interplay among the self-propulsion force F0, spatial confinement by U0(x), and thermal noise, as well as its effects on activity-assisted escape dynamics and transport of the SPPs.",

author = "Yan Wen and Zhihao Li and Haiqin Wang and Jing Zheng and Jinyao Tang and Pik-Yin Lai and Xinpeng Xu and Penger Tong",

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AU - Wen, Yan

AU - Li, Zhihao

AU - Wang, Haiqin

AU - Zheng, Jing

AU - Tang, Jinyao

AU - Lai, Pik-Yin

AU - Xu, Xinpeng

AU - Tong, Penger

PY - 2023/3

Y1 - 2023/3

N2 - We report a systematic study of the dynamics of self-propelled particles (SPPs) over a one-dimensional periodic potential landscape U0(x), which is fabricated on a microgroove-patterned polydimethylsiloxane (PDMS) substrate. From the measured nonequilibrium probability density function P(x;F0) of the SPPs, we find that the escape dynamics of the slow rotating SPPs across the potential landscape can be described by an effective potential Ueff(x;F0), once the self-propulsion force F0 is included into the potential under the fixed angle approximation. This work demonstrates that the parallel microgrooves provide a versatile platform for a quantitative understanding of the interplay among the self-propulsion force F0, spatial confinement by U0(x), and thermal noise, as well as its effects on activity-assisted escape dynamics and transport of the SPPs.

AB - We report a systematic study of the dynamics of self-propelled particles (SPPs) over a one-dimensional periodic potential landscape U0(x), which is fabricated on a microgroove-patterned polydimethylsiloxane (PDMS) substrate. From the measured nonequilibrium probability density function P(x;F0) of the SPPs, we find that the escape dynamics of the slow rotating SPPs across the potential landscape can be described by an effective potential Ueff(x;F0), once the self-propulsion force F0 is included into the potential under the fixed angle approximation. This work demonstrates that the parallel microgrooves provide a versatile platform for a quantitative understanding of the interplay among the self-propulsion force F0, spatial confinement by U0(x), and thermal noise, as well as its effects on activity-assisted escape dynamics and transport of the SPPs.

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Activity-assisted barrier crossing of self-propelled colloids over parallel microgrooves

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