Diffusing wave paradox of phototactic particles in traveling light pulses

Lozano, Celia; Bechinger, Clemens

Diffusing wave paradox of phototactic particles in traveling light pulses

Dateien

Lozano_2-1dbcn7uhzv6d00.pdf(2.01 MB)

Datum

2019

EU-Projektnummer

693683

Projekt

Suspensions with Controlled Interaction Rules ASCIR

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Nature Communications ; 10 (2019). - 2495. - eISSN 2041-1723

Zusammenfassung

Cells navigate through complex surroundings by following cues from their environment. A prominent example is Dictyostelium, which is directed by chemotaxis towards regions with higher concentrations. In the presence of traveling chemical waves, however, amoebae migrate counter to the running wave. Such behavior, referred to as diffusing wave paradox, suggests the existence of adaptation and directional memory. Here we experimentally investigate the response of phototactic self-propelled microparticles to traveling light-pulses. Despite their entirely memory-less (i.e., strictly local) response to the environment, we observe the same phenomenological behavior, i.e., particle motion counter to the pulse direction. Our findings are supported by a minimal model which considers active particle reorientations within local light gradients. The complex and robust behavior of synthetic active particles to spatially and temporally varying stimuli enables new strategies for achieving collective behavior and can be used for the design of micro-robotic systems with limited signal-processing capabilities.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

LOZANO, Celia, Clemens BECHINGER, 2019. Diffusing wave paradox of phototactic particles in traveling light pulses. In: Nature Communications. 10, 2495. eISSN 2041-1723. Available under: doi: 10.1038/s41467-019-10535-z

BibTex

@article{Lozano2019Diffu-46070,
  year={2019},
  doi={10.1038/s41467-019-10535-z},
  title={Diffusing wave paradox of phototactic particles in traveling light pulses},
  volume={10},
  journal={Nature Communications},
  author={Lozano, Celia and Bechinger, Clemens},
  note={Article Number: 2495}
}

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