---
_id: '9053'
abstract:
- lang: eng
text: The development of strategies to assemble microscopic machines from dissipative
building blocks are essential on the route to novel active materials. We recently
demonstrated the hierarchical self-assembly of phoretic microswimmers into self-spinning
microgears and their synchronization by diffusiophoretic interactions [Aubret
et al., Nat. Phys., 2018]. In this paper, we adopt a pedagogical approach and
expose our strategy to control self-assembly and build machines using phoretic
phenomena. We notably introduce Highly Inclined Laminated Optical sheets microscopy
(HILO) to image and characterize anisotropic and dynamic diffusiophoretic interactions,
which cannot be performed by conventional fluorescence microscopy. The dynamics
of a (haematite) photocatalytic material immersed in (hydrogen peroxide) fuel
under various illumination patterns is first described and quantitatively rationalized
by a model of diffusiophoresis, the migration of a colloidal particle in a concentration
gradient. It is further exploited to design phototactic microswimmers that direct
towards the high intensity of light, as a result of the reorientation of the haematite
in a light gradient. We finally show the assembly of self-spinning microgears
from colloidal microswimmers and carefully characterize the interactions using
HILO techniques. The results are compared with analytical and numerical predictions
and agree quantitatively, stressing the important role played by concentration
gradients induced by chemical activity to control and design interactions. Because
the approach described hereby is generic, this works paves the way for the rational
design of machines by controlling phoretic phenomena.
article_processing_charge: No
article_type: original
author:
- first_name: Antoine
full_name: Aubret, Antoine
last_name: Aubret
- first_name: Jérémie A
full_name: Palacci, Jérémie A
id: 8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d
last_name: Palacci
orcid: 0000-0002-7253-9465
citation:
ama: Aubret A, Palacci JA. Diffusiophoretic design of self-spinning microgears from
colloidal microswimmers. Soft Matter. 2018;14(47):9577-9588. doi:10.1039/c8sm01760c
apa: Aubret, A., & Palacci, J. A. (2018). Diffusiophoretic design of self-spinning
microgears from colloidal microswimmers. Soft Matter. Royal Society of
Chemistry . https://doi.org/10.1039/c8sm01760c
chicago: Aubret, Antoine, and Jérémie A Palacci. “Diffusiophoretic Design of Self-Spinning
Microgears from Colloidal Microswimmers.” Soft Matter. Royal Society of
Chemistry , 2018. https://doi.org/10.1039/c8sm01760c.
ieee: A. Aubret and J. A. Palacci, “Diffusiophoretic design of self-spinning microgears
from colloidal microswimmers,” Soft Matter, vol. 14, no. 47. Royal Society
of Chemistry , pp. 9577–9588, 2018.
ista: Aubret A, Palacci JA. 2018. Diffusiophoretic design of self-spinning microgears
from colloidal microswimmers. Soft Matter. 14(47), 9577–9588.
mla: Aubret, Antoine, and Jérémie A. Palacci. “Diffusiophoretic Design of Self-Spinning
Microgears from Colloidal Microswimmers.” Soft Matter, vol. 14, no. 47,
Royal Society of Chemistry , 2018, pp. 9577–88, doi:10.1039/c8sm01760c.
short: A. Aubret, J.A. Palacci, Soft Matter 14 (2018) 9577–9588.
date_created: 2021-02-01T13:44:41Z
date_published: 2018-12-21T00:00:00Z
date_updated: 2023-02-23T13:47:43Z
day: '21'
doi: 10.1039/c8sm01760c
extern: '1'
external_id:
arxiv:
- '1909.11121'
pmid:
- '30456407'
intvolume: ' 14'
issue: '47'
keyword:
- General Chemistry
- Condensed Matter Physics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1909.11121
month: '12'
oa: 1
oa_version: Preprint
page: 9577-9588
pmid: 1
publication: Soft Matter
publication_identifier:
eissn:
- 1744-6848
issn:
- 1744-683X
publication_status: published
publisher: 'Royal Society of Chemistry '
quality_controlled: '1'
scopus_import: '1'
status: public
title: Diffusiophoretic design of self-spinning microgears from colloidal microswimmers
type: journal_article
user_id: D865714E-FA4E-11E9-B85B-F5C5E5697425
volume: 14
year: '2018'
...