Chiral Active Particles are Sensitive Reporter to Environmental Geometry
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866914682557693952 |
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| author | Chan, Chung Wing Wu, Daihui Qiao, Kaiyao Fong, Kin Long Yang, Zhiyu Han, Yilong Zhang, Rui |
| author_facet | Chan, Chung Wing Wu, Daihui Qiao, Kaiyao Fong, Kin Long Yang, Zhiyu Han, Yilong Zhang, Rui |
| contents | Chiral active particles (CAPs) are self-propelling particles that break time-reversal symmetry by orbiting or spinning, leading to intriguing behaviors. Here, we examined the dynamics of CAPs moving in 2D lattices of disk obstacles through active Brownian dynamics simulations and granular experiments with grass seeds. We find that the effective diffusivity of the CAPs is sensitive to the structure of the obstacle lattice, a feature absent in achiral active particles. We further studied the transport of CAPs in obstacle arrays under an external field and found a reentrant directional locking effect, which can be used to sort CAPs with different activities. Finally, we demonstrated that the parallelogram lattice of obstacles without mirror symmetry can separate clockwise and counter-clockwise CAPs. The mechanisms of the above three novel phenomena are qualitatively explained. As such, our work provides a basis for designing chirality-based tools for single-cell diagnosis and separation, and active particle-based environmental sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_06662 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Chiral Active Particles are Sensitive Reporter to Environmental Geometry Chan, Chung Wing Wu, Daihui Qiao, Kaiyao Fong, Kin Long Yang, Zhiyu Han, Yilong Zhang, Rui Soft Condensed Matter Chiral active particles (CAPs) are self-propelling particles that break time-reversal symmetry by orbiting or spinning, leading to intriguing behaviors. Here, we examined the dynamics of CAPs moving in 2D lattices of disk obstacles through active Brownian dynamics simulations and granular experiments with grass seeds. We find that the effective diffusivity of the CAPs is sensitive to the structure of the obstacle lattice, a feature absent in achiral active particles. We further studied the transport of CAPs in obstacle arrays under an external field and found a reentrant directional locking effect, which can be used to sort CAPs with different activities. Finally, we demonstrated that the parallelogram lattice of obstacles without mirror symmetry can separate clockwise and counter-clockwise CAPs. The mechanisms of the above three novel phenomena are qualitatively explained. As such, our work provides a basis for designing chirality-based tools for single-cell diagnosis and separation, and active particle-based environmental sensors. |
| title | Chiral Active Particles are Sensitive Reporter to Environmental Geometry |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2310.06662 |