Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment

Publication type:
Journal article
Metadata:
Autoren
  • Nadir Moeller
  • Benno Liebchen
  • Thomas Palberg
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000632762200002&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1140/epje/s10189-021-00026-9
eISSN
1292-895X
Externe Identifier
  • Clarivate Analytics Document Solution ID: RC4GV
  • PubMed Identifier: 33759011
ISSN
1292-8941
Ausgabe der Veröffentlichung
3
Zeitschrift
EUROPEAN PHYSICAL JOURNAL E
Artikelnummer
ARTN 41
Datum der Veröffentlichung
2021
Status
Published
Titel
Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment
Sub types
  • Article
Ausgabe der Zeitschrift
44

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:sec> <jats:title>Abstract</jats:title> <jats:p>pH 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 <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sim 0.02~\hbox {pH}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>∼</mml:mo> <mml:mn>0.02</mml:mn> <mml:mspace /> <mml:mtext>pH</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> 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 <jats:inline-formula><jats:alternatives><jats:tex-math>$$\hbox {CO}_{2}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mtext>CO</mml:mtext> <mml:mn>2</mml:mn> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula>. 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.</jats:p> </jats:sec><jats:sec> <jats:title>Graphic Abstract</jats:title> </jats:sec>
Autoren
  • Nadir Möller
  • Benno Liebchen
  • Thomas Palberg
DOI
10.1140/epje/s10189-021-00026-9
eISSN
1292-895X
ISSN
1292-8941
Ausgabe der Veröffentlichung
3
Zeitschrift
The European Physical Journal E
Sprache
en
Artikelnummer
41
Online publication date
2021
Datum der Veröffentlichung
2021
Status
Published
Herausgeber
Springer Science and Business Media LLC
Herausgeber URL
http://dx.doi.org/10.1140/epje/s10189-021-00026-9
Datum der Datenerfassung
2021
Titel
Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment
Ausgabe der Zeitschrift
44

Data source: Crossref

Abstract
pH 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 [Formula: see text] 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 [Formula: see text]. 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.
Addresses
  • Institute of Condensed Matter Physics, Johannes Gutenberg Universität, Staudinger Weg 7, 55128, Mainz, Germany. namoelle@uni-mainz.de.
Autoren
  • Nadir Möller
  • Benno Liebchen
  • Thomas Palberg
DOI
10.1140/epje/s10189-021-00026-9
eISSN
1292-895X
Externe Identifier
  • PubMed Identifier: 33759011
  • PubMed Central ID: PMC7987694
Funding acknowledgements
  • Johannes Gutenberg-Universität Mainz:
Open access
true
ISSN
1292-8941
Ausgabe der Veröffentlichung
3
Zeitschrift
The European physical journal. E, Soft matter
Schlüsselwörter
  • Carbonic Acid
  • Environment
  • Movement
  • Swimming
  • Hydrogen-Ion Concentration
Sprache
eng
Medium
Electronic
Online publication date
2021
Open access status
Open Access
Paginierung
41
Datum der Veröffentlichung
2021
Status
Published
Publisher licence
CC BY
Datum der Datenerfassung
2021
Titel
Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment.
Sub types
  • research-article
  • Journal Article
Ausgabe der Zeitschrift
44

Files

https://link.springer.com/content/pdf/10.1140/epje/s10189-021-00026-9.pdf https://europepmc.org/articles/PMC7987694?pdf=render

Data source: Europe PubMed Central

Abstract
pH 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 [Formula: see text] 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 [Formula: see text]. 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.
Date of acceptance
2021
Autoren
  • Nadir Möller
  • Benno Liebchen
  • Thomas Palberg
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/33759011
DOI
10.1140/epje/s10189-021-00026-9
eISSN
1292-895X
Externe Identifier
  • PubMed Central ID: PMC7987694
Ausgabe der Veröffentlichung
3
Zeitschrift
Eur Phys J E Soft Matter
Schlüsselwörter
  • Carbonic Acid
  • Environment
  • Hydrogen-Ion Concentration
  • Movement
  • Swimming
Sprache
eng
Country
France
Paginierung
41
PII
10.1140/epje/s10189-021-00026-9
Datum der Veröffentlichung
2021
Status
Published online
Datum, an dem der Datensatz öffentlich gemacht wurde
2021
Titel
Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
44

Data source: PubMed

Author's licence
CC-BY
Autoren
  • Nadir Möller
  • Benno Liebchen
  • Thomas Palberg
Hosting institution
Universitätsbibliothek Mainz
Sammlungen
  • JGU-Publikationen
Resource version
Published version
DOI
10.1140/epje/s10189-021-00026-9
File(s) embargoed
false
Open access
true
ISSN
1292-895X
Zeitschrift
The European physical journal : E, Soft matter
Schlüsselwörter
  • 530 Physik
  • 530 Physics
Sprache
eng
Open access status
Open Access
Paginierung
41
Datum der Veröffentlichung
2021
Public URL
https://openscience.ub.uni-mainz.de/handle/20.500.12030/7299
Herausgeber
Springer
Datum der Datenerfassung
2022
Datum, an dem der Datensatz öffentlich gemacht wurde
2022
Zugang
Public
Titel
Shaping the gradients driving phoretic micro-swimmers : influence of swimming speed, budget of carbonic acid and environment
Ausgabe der Zeitschrift
44

Files

shaping_the_gradients_driving-20220701131905659.pdf

Data source: OPENSCIENCE.UB

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