Light driven guided and self-organized motion of mesoporous colloidal particles
- We report on guided and self-organized motion of ensembles of mesoporous colloidal particles that can undergo dynamic aggregation or separation upon exposure to light. The forces on particles involve the phenomenon of light-driven diffusioosmosis (LDDO) and are hydrodynamic in nature. They can be made to act passively on the ensemble as a whole but also used to establish a mutual interaction between particles. The latter scenario requires a porous colloid morphology such that the particle can act as a source or sink of a photosensitive surfactant, which drives the LDDO process. The interplay between the two modes of operation leads to fascinating possibilities of dynamical organization and manipulation of colloidal ensembles adsorbed at solid-liquid interfaces. While the passive mode can be thought of to allow for a coarse structuring of a cloud of colloids, the inter-particle mode may be used to impose a fine structure on a 2D particle grid. Local flow is used to impose and tailor interparticle interactions allowing for much largerWe report on guided and self-organized motion of ensembles of mesoporous colloidal particles that can undergo dynamic aggregation or separation upon exposure to light. The forces on particles involve the phenomenon of light-driven diffusioosmosis (LDDO) and are hydrodynamic in nature. They can be made to act passively on the ensemble as a whole but also used to establish a mutual interaction between particles. The latter scenario requires a porous colloid morphology such that the particle can act as a source or sink of a photosensitive surfactant, which drives the LDDO process. The interplay between the two modes of operation leads to fascinating possibilities of dynamical organization and manipulation of colloidal ensembles adsorbed at solid-liquid interfaces. While the passive mode can be thought of to allow for a coarse structuring of a cloud of colloids, the inter-particle mode may be used to impose a fine structure on a 2D particle grid. Local flow is used to impose and tailor interparticle interactions allowing for much larger interaction distances that can be achieved with, e.g., DLVO type of forces, and is much more versatile.…
Author details: | Pooja AryaORCiDGND, David FeldmannORCiDGND, Alexey KopyshevORCiDGND, Nino Lomadze, Svetlana SanterORCiDGND |
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DOI: | https://doi.org/10.1039/c9sm02068c |
ISSN: | 1744-683X |
ISSN: | 1744-6848 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31830185 |
Title of parent work (English): | Soft matter |
Publisher: | Royal Society of Chemistry |
Place of publishing: | Cambridge |
Publication type: | Article |
Language: | English |
Date of first publication: | 2019/12/05 |
Publication year: | 2020 |
Release date: | 2023/03/23 |
Volume: | 16 |
Issue: | 5 |
Number of pages: | 8 |
First page: | 1148 |
Last Page: | 1155 |
Funding institution: | Priority Program 1726 "Microswimmers-From Single Particle Motion to; Collective Behaviour'', Germany; DFGGerman Research Foundation (DFG); [SA1657/8-1]; International Max Planck Research School on Multiscale; Bio-Systems (IMPRS), Potsdam, Germany |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften |
Peer review: | Referiert |