Capture and transport of rod-shaped cargo via programmable active particles

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Scientific Reports. Springer. 2023, 13(1), 15071. eISSN 2045-2322. Available under: doi: 10.1038/s41598-023-42119-9
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We study the influence of the cargo shape on the capture and transport process of colloidal rods via swarms of active particles using Brownian dynamics simulations. Starting at random initial conditions, active particles that interact via the Lennard-Jones potential and possess a tuneable speed are utilised to capture passive rods inside a hexagonal cage of individually addressable units. By adjusting the velocity of the individual active particles, the rod can then be transported. To guarantee a successful capture process (with a strong localisation), we find that specific geometric and energetic constraints have to be met; i.e., the length of the rod must approximately be in the vicinity of an odd multiple of the lattice constant of the hexagonal cage, and the Lennard-Jones interaction strength must be in the range of 3.0kBT to 6.0kBT. If the cargo aspect ratio gets too large, the subsequent transport of successfully captured rods can fail. For systems where transport is possible, an increase in the cargo aspect ratio decreases the achievable transport velocity. Our work shows that the particle shape must be considered while designing interaction rules to accomplish specific tasks via groups of controllable units.

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ISO 690BAUMGÄRTEL, Philipp, Anton LÜDERS, Peter NIELABA, 2023. Capture and transport of rod-shaped cargo via programmable active particles. In: Scientific Reports. Springer. 2023, 13(1), 15071. eISSN 2045-2322. Available under: doi: 10.1038/s41598-023-42119-9
BibTex
@article{Baumgartel2023-09-12Captu-67777,
  year={2023},
  doi={10.1038/s41598-023-42119-9},
  title={Capture and transport of rod-shaped cargo via programmable active particles},
  number={1},
  volume={13},
  journal={Scientific Reports},
  author={Baumgärtel, Philipp and Lüders, Anton and Nielaba, Peter},
  note={Article Number: 15071}
}
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