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- W3130114050 abstract "Abstract Many motile cells exhibit migratory behaviors, such as chemotaxis (motion up or down a chemical gradient) or chemokinesis (dependence of speed on chemical concentration), which enable them to carry out vital functions including immune response, egg fertilization, and predator evasion. These have inspired researchers to develop self-propelled colloidal analogues to biological microswimmers, known as active colloids, that perform similar feats. Here, we study the behavior of half-platinum half-gold (Pt/Au) self-propelled rods in antiparallel gradients of hydrogen peroxide fuel and salt, which tend to increase and decrease the rods’ speed, respectively. Brownian Dynamics simulations, a Fokker–Planck theoretical model, and experiments demonstrate that, at steady state, the rods accumulate in low-speed (salt-rich, peroxide-poor) regions not because of chemotaxis, but because of chemokinesis. Chemokinesis is distinct from chemotaxis in that no directional sensing or reorientation capabilities are required. The agreement between simulations, model, and experiments bolsters the role of chemokinesis in this system. This work suggests a novel strategy of exploiting chemokinesis to effect accumulation of motile colloids in desired areas." @default.
- W3130114050 created "2021-03-01" @default.
- W3130114050 creator A5055942456 @default.
- W3130114050 creator A5073210853 @default.
- W3130114050 creator A5076540048 @default.
- W3130114050 creator A5079255659 @default.
- W3130114050 date "2021-02-26" @default.
- W3130114050 modified "2023-09-25" @default.
- W3130114050 title "Chemokinesis-driven accumulation of active colloids in low-mobility regions of fuel gradients" @default.
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- W3130114050 doi "https://doi.org/10.1038/s41598-021-83963-x" @default.
- W3130114050 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7910604" @default.
- W3130114050 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33637781" @default.
- W3130114050 hasPublicationYear "2021" @default.
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