Directional Swimming of B. Subtilis Bacteria Near a Switchable Polar Surface
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arXiv
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| Format: | Preprint |
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2024
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| author | Arachchige, Mahesha Kodithuwakku Siddiquee, Zakaria Baza, Hend Twieg, Robert Lavrentovich, Oleg D. Jákli, Antal |
| author_facet | Arachchige, Mahesha Kodithuwakku Siddiquee, Zakaria Baza, Hend Twieg, Robert Lavrentovich, Oleg D. Jákli, Antal |
| contents | The dynamics of swimming bacteria depend on the properties of their habitat media. Recently it was shown that the motion of swimming bacteria dispersed directly in a non-toxic water-based lyotropic chromonic liquid crystal can be controlled by the director field of the liquid crystal. Here we investigate whether the macroscopic polar order of a ferroelectric nematic liquid crystal (NF) can be recognized by bacteria B. Subtilis swimming in a water dispersion adjacent to a glassy NF film by surface interactions alone. We show that B. Subtilis tends to move in the direction antiparallel to the spontaneous electric polarization at the NF surface. Their speed was found to be the same with or without a polar NF layer. In contrast to observation on crystal ferroelectric films, the bacteria do not get immobilized. These observations may offer a pathway to creation of polar microinserts to direct bacterial motion in-vivo. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_11877 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Directional Swimming of B. Subtilis Bacteria Near a Switchable Polar Surface Arachchige, Mahesha Kodithuwakku Siddiquee, Zakaria Baza, Hend Twieg, Robert Lavrentovich, Oleg D. Jákli, Antal Soft Condensed Matter Materials Science Biological Physics The dynamics of swimming bacteria depend on the properties of their habitat media. Recently it was shown that the motion of swimming bacteria dispersed directly in a non-toxic water-based lyotropic chromonic liquid crystal can be controlled by the director field of the liquid crystal. Here we investigate whether the macroscopic polar order of a ferroelectric nematic liquid crystal (NF) can be recognized by bacteria B. Subtilis swimming in a water dispersion adjacent to a glassy NF film by surface interactions alone. We show that B. Subtilis tends to move in the direction antiparallel to the spontaneous electric polarization at the NF surface. Their speed was found to be the same with or without a polar NF layer. In contrast to observation on crystal ferroelectric films, the bacteria do not get immobilized. These observations may offer a pathway to creation of polar microinserts to direct bacterial motion in-vivo. |
| title | Directional Swimming of B. Subtilis Bacteria Near a Switchable Polar Surface |
| topic | Soft Condensed Matter Materials Science Biological Physics |
| url | https://arxiv.org/abs/2412.11877 |