Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-7285
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dc.contributor.authorMöller, Nadir-
dc.contributor.authorLiebchen, Benno-
dc.contributor.authorPalberg, Thomas-
dc.date.accessioned2022-07-04T08:20:00Z-
dc.date.available2022-07-04T08:20:00Z-
dc.date.issued2021-
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/7299-
dc.description.abstractpH gradient-driven modular micro-swimmers are investigated as a model for a large variety of quasi-two-dimensional chemi-phoretic self-propelled entities. Using three-channel micro-photometry, we obtain a precise large field mapping of pH at a spatial resolution of a few microns and a pH resolution of ∼0.02 pH units for swimmers of different velocities propelling on two differently charged substrates. We model our results in terms of solutions of the three-dimensional advection–diffusion equation for a 1:1 electrolyte, i.e. carbonic acid, which is produced by ion exchange and consumed by equilibration with dissolved CO2. We demonstrate the dependence of gradient shape and steepness on swimmer speed, diffusivity of chemicals, as well as the fuel budget. Moreover, we experimentally observe a subtle, but significant feedback of the swimmer’s immediate environment in terms of a substrate charge-mediated solvent convection. We discuss our findings in view of different recent results from other micro-fluidic or active matter investigations. We anticipate that they are relevant for quantitative modelling and targeted applications of diffusio-phoretic flows in general and artificial micro-swimmers in particular.en_GB
dc.language.isoengde
dc.rightsCC BY*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subject.ddc530 Physikde_DE
dc.subject.ddc530 Physicsen_GB
dc.titleShaping the gradients driving phoretic micro-swimmers : influence of swimming speed, budget of carbonic acid and environmenten_GB
dc.typeZeitschriftenaufsatzde
dc.identifier.doihttp://doi.org/10.25358/openscience-7285-
jgu.type.dinitypearticleen_GB
jgu.type.versionPublished versionde
jgu.type.resourceTextde
jgu.organisation.departmentFB 08 Physik, Mathematik u. Informatikde
jgu.organisation.departmentMaxPlanck GraduateCenterde
jgu.organisation.number7940-
jgu.organisation.number9010-
jgu.organisation.nameJohannes Gutenberg-Universität Mainz-
jgu.rights.accessrightsopenAccess-
jgu.journal.titleThe European physical journal : E, Soft matterde
jgu.journal.volume44de
jgu.pages.alternative41de
jgu.publisher.year2021-
jgu.publisher.nameSpringerde
jgu.publisher.placeBerlin u.a.de
jgu.publisher.issn1292-895Xde
jgu.organisation.placeMainz-
jgu.subject.ddccode530de
jgu.publisher.doi10.1140/epje/s10189-021-00026-9de
jgu.organisation.rorhttps://ror.org/023b0x485
Appears in collections:JGU-Publikationen

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