Boundaries can steer active Janus spheres

Sambeeta Das, Astha Garg, Andrew I. Campbell, Jonathan Howse, Ayusman Sen, Darrell Velegol, Ramin Golestanian, Stephen J. Ebbens

Research output: Contribution to journalArticle

139 Citations (Scopus)

Abstract

The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.

Original languageEnglish (US)
Article number8999
JournalNature communications
Volume6
DOIs
StatePublished - Dec 1 2015

Fingerprint

Janus
propulsion
Propulsion
Colloids
Hydrodynamics
solid surfaces
cleaning
colloids
proximity
Quenching
Cleaning
quenching
hydrodynamics
Trajectories
trajectories
Equipment and Supplies
Research

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Das, S., Garg, A., Campbell, A. I., Howse, J., Sen, A., Velegol, D., ... Ebbens, S. J. (2015). Boundaries can steer active Janus spheres. Nature communications, 6, [8999]. https://doi.org/10.1038/ncomms9999
Das, Sambeeta ; Garg, Astha ; Campbell, Andrew I. ; Howse, Jonathan ; Sen, Ayusman ; Velegol, Darrell ; Golestanian, Ramin ; Ebbens, Stephen J. / Boundaries can steer active Janus spheres. In: Nature communications. 2015 ; Vol. 6.
@article{38bab897616c40f2bee12e4230fa0e37,
title = "Boundaries can steer active Janus spheres",
abstract = "The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.",
author = "Sambeeta Das and Astha Garg and Campbell, {Andrew I.} and Jonathan Howse and Ayusman Sen and Darrell Velegol and Ramin Golestanian and Ebbens, {Stephen J.}",
year = "2015",
month = "12",
day = "1",
doi = "10.1038/ncomms9999",
language = "English (US)",
volume = "6",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

Das, S, Garg, A, Campbell, AI, Howse, J, Sen, A, Velegol, D, Golestanian, R & Ebbens, SJ 2015, 'Boundaries can steer active Janus spheres', Nature communications, vol. 6, 8999. https://doi.org/10.1038/ncomms9999

Boundaries can steer active Janus spheres. / Das, Sambeeta; Garg, Astha; Campbell, Andrew I.; Howse, Jonathan; Sen, Ayusman; Velegol, Darrell; Golestanian, Ramin; Ebbens, Stephen J.

In: Nature communications, Vol. 6, 8999, 01.12.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Boundaries can steer active Janus spheres

AU - Das, Sambeeta

AU - Garg, Astha

AU - Campbell, Andrew I.

AU - Howse, Jonathan

AU - Sen, Ayusman

AU - Velegol, Darrell

AU - Golestanian, Ramin

AU - Ebbens, Stephen J.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.

AB - The advent of autonomous self-propulsion has instigated research towards making colloidal machines that can deliver mechanical work in the form of transport, and other functions such as sensing and cleaning. While much progress has been made in the last 10 years on various mechanisms to generate self-propulsion, the ability to steer self-propelled colloidal devices has so far been much more limited. A critical barrier in increasing the impact of such motors is in directing their motion against the Brownian rotation, which randomizes particle orientations. In this context, here we report directed motion of a specific class of catalytic motors when moving in close proximity to solid surfaces. This is achieved through active quenching of their Brownian rotation by constraining it in a rotational well, caused not by equilibrium, but by hydrodynamic effects. We demonstrate how combining these geometric constraints can be utilized to steer these active colloids along arbitrary trajectories.

UR - http://www.scopus.com/inward/record.url?scp=84948808373&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84948808373&partnerID=8YFLogxK

U2 - 10.1038/ncomms9999

DO - 10.1038/ncomms9999

M3 - Article

C2 - 26627125

AN - SCOPUS:84948808373

VL - 6

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 8999

ER -