中国物理B ›› 2018, Vol. 27 ›› Issue (11): 118701-118701.doi: 10.1088/1674-1056/27/11/118701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Unidirectional rotation of circles driven by chiral active particles

Jiamin Chen(陈佳敏), Xiaolin Zhou(周晓琳), Linxi Zhang(章林溪)   

  1. Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2018-06-21 修回日期:2018-09-03 出版日期:2018-11-05 发布日期:2018-11-05
  • 通讯作者: Linxi Zhang E-mail:lxzhang@zju.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21674096 and 21873082).

Unidirectional rotation of circles driven by chiral active particles

Jiamin Chen(陈佳敏), Xiaolin Zhou(周晓琳), Linxi Zhang(章林溪)   

  1. Department of Physics, Zhejiang University, Hangzhou 310027, China
  • Received:2018-06-21 Revised:2018-09-03 Online:2018-11-05 Published:2018-11-05
  • Contact: Linxi Zhang E-mail:lxzhang@zju.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21674096 and 21873082).

摘要:

The dynamics of two-dimensional rigid circles filled with chiral active particles are investigated by employing the overdamped Langevin dynamics simulations. Unidirectional rotation of rigid circles is observed, and the rotational angular velocity (ω') relies mainly on the length (l), the number (nB), and tilt angle (γ) of boards, and the angular velocity (ω) and area fraction (ρ) of chiral active particles. There are optimum values for these parameters at which the average angular velocity of circle reaches its maximum. The center-of-mass mean square displacement for circles drops by about two orders of magnitude for large angular velocity ω of chiral active particles with oscillations in the short-time regime. Our work demonstrates that nanofabricated objects with suitable designs immersed in a bath of chiral active particles can extract and rectify energy in a unidirectional motion.

关键词: unidirectional rotation, dynamics, chiral active particle, nanofabricated object

Abstract:

The dynamics of two-dimensional rigid circles filled with chiral active particles are investigated by employing the overdamped Langevin dynamics simulations. Unidirectional rotation of rigid circles is observed, and the rotational angular velocity (ω') relies mainly on the length (l), the number (nB), and tilt angle (γ) of boards, and the angular velocity (ω) and area fraction (ρ) of chiral active particles. There are optimum values for these parameters at which the average angular velocity of circle reaches its maximum. The center-of-mass mean square displacement for circles drops by about two orders of magnitude for large angular velocity ω of chiral active particles with oscillations in the short-time regime. Our work demonstrates that nanofabricated objects with suitable designs immersed in a bath of chiral active particles can extract and rectify energy in a unidirectional motion.

Key words: unidirectional rotation, dynamics, chiral active particle, nanofabricated object

中图分类号:  (Molecular dynamics simulation)

  • 87.10.Tf
87.85.St (Robotics) 87.85.Va (Micromachining)