Spontaneous demixing of chiral active mixtures in motility-induced phase separation
The demixing and sorting strategies for chiral active mixtures are crucial to the biochemical and pharmaceutical industries. However, it remains uncertain whether chiral mixed particles can spontaneously demix without the aid of specific strategies. In this paper, we investigate the demixing behavio...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/acdf79 |
| _version_ | 1797748730215006208 |
|---|---|
| author | Bao-Quan Ai Shan Quan Feng-guo Li |
| author_facet | Bao-Quan Ai Shan Quan Feng-guo Li |
| author_sort | Bao-Quan Ai |
| collection | DOAJ |
| description | The demixing and sorting strategies for chiral active mixtures are crucial to the biochemical and pharmaceutical industries. However, it remains uncertain whether chiral mixed particles can spontaneously demix without the aid of specific strategies. In this paper, we investigate the demixing behaviors of binary mixtures in a model of chiral active particles to understand the demixing mechanism of chiral active mixtures. We demonstrate that chiral mixed particles can spontaneously demix in motility-induced phase separation (MIPS). The hidden velocity alignment in MIPS allows particles of different types to accumulate in different clusters, thereby facilitating separation. There exists an optimal angular velocity or packing fraction at which this separation is optimal. Noise (translational or rotational diffusion) can promote mixture separation in certain cases, rather than always being detrimental to the process. Since the order caused by the hidden velocity alignment in this process is not global, the separation behavior is strongly dependent on the system size. Furthermore, we also discovered that the mixture separation caused by MIPS is different from that resulting from explicit velocity alignment. Our findings are crucial for understanding the demixing mechanism of chiral active mixtures and can be applied to experiments attempting to separate various active mixtures in the future. |
| first_indexed | 2024-03-12T16:09:01Z |
| format | Article |
| id | doaj.art-ec1fa91541c24372857fde7e2b6a6571 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:09:01Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ec1fa91541c24372857fde7e2b6a65712023-08-09T14:13:25ZengIOP PublishingNew Journal of Physics1367-26302023-01-0125606302510.1088/1367-2630/acdf79Spontaneous demixing of chiral active mixtures in motility-induced phase separationBao-Quan Ai0https://orcid.org/0000-0002-3033-8630Shan Quan1Feng-guo Li2Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics, South China Normal University , Guangzhou 510006, People’s Republic of China; Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University , Guangzhou 510006, People’s Republic of ChinaGuangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics, South China Normal University , Guangzhou 510006, People’s Republic of China; Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University , Guangzhou 510006, People’s Republic of ChinaGuangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics, South China Normal University , Guangzhou 510006, People’s Republic of China; Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University , Guangzhou 510006, People’s Republic of ChinaThe demixing and sorting strategies for chiral active mixtures are crucial to the biochemical and pharmaceutical industries. However, it remains uncertain whether chiral mixed particles can spontaneously demix without the aid of specific strategies. In this paper, we investigate the demixing behaviors of binary mixtures in a model of chiral active particles to understand the demixing mechanism of chiral active mixtures. We demonstrate that chiral mixed particles can spontaneously demix in motility-induced phase separation (MIPS). The hidden velocity alignment in MIPS allows particles of different types to accumulate in different clusters, thereby facilitating separation. There exists an optimal angular velocity or packing fraction at which this separation is optimal. Noise (translational or rotational diffusion) can promote mixture separation in certain cases, rather than always being detrimental to the process. Since the order caused by the hidden velocity alignment in this process is not global, the separation behavior is strongly dependent on the system size. Furthermore, we also discovered that the mixture separation caused by MIPS is different from that resulting from explicit velocity alignment. Our findings are crucial for understanding the demixing mechanism of chiral active mixtures and can be applied to experiments attempting to separate various active mixtures in the future.https://doi.org/10.1088/1367-2630/acdf79spontaneous demixingchiral active mixturesmotility-induced phase separation |
| spellingShingle | Bao-Quan Ai Shan Quan Feng-guo Li Spontaneous demixing of chiral active mixtures in motility-induced phase separation New Journal of Physics spontaneous demixing chiral active mixtures motility-induced phase separation |
| title | Spontaneous demixing of chiral active mixtures in motility-induced phase separation |
| title_full | Spontaneous demixing of chiral active mixtures in motility-induced phase separation |
| title_fullStr | Spontaneous demixing of chiral active mixtures in motility-induced phase separation |
| title_full_unstemmed | Spontaneous demixing of chiral active mixtures in motility-induced phase separation |
| title_short | Spontaneous demixing of chiral active mixtures in motility-induced phase separation |
| title_sort | spontaneous demixing of chiral active mixtures in motility induced phase separation |
| topic | spontaneous demixing chiral active mixtures motility-induced phase separation |
| url | https://doi.org/10.1088/1367-2630/acdf79 |
| work_keys_str_mv | AT baoquanai spontaneousdemixingofchiralactivemixturesinmotilityinducedphaseseparation AT shanquan spontaneousdemixingofchiralactivemixturesinmotilityinducedphaseseparation AT fengguoli spontaneousdemixingofchiralactivemixturesinmotilityinducedphaseseparation |