Induced capillary dipoles in floating particle assemblies

[en] Capillary-driven self-assembly is a common fabrication method that consists of placing floating particles onto a liquid-air interface. The attractive interaction between particles is due to the local deformations of the interface and is often described via so-called capillary charges. This approach holds for similar particles far from each other. When particles are close together or when they differ in size, their contact lines become tilted. By using different spherical particles, we show evidence experimentally that the capillary interaction becomes far more complex. We propose to consider induced capillary dipoles to model the menisci, therefore providing an extra attraction at short distances. This effect is enhanced for particles of different sizes such that binary self-assemblies reveal unusual local ordering.

Disciplines :

Physics

Author, co-author :

Delens, Megan ^✱; Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)

Collard, Ylona ^✱; Université de Liège - ULiège > Faculté des Sciences > Doct. scienc. (physiques)

Vandewalle, Nicolas ; Université de Liège - ULiège > Département de physique > Physique statistique

^✱ These authors have contributed equally to this work.

Language :

English

Title :

Induced capillary dipoles in floating particle assemblies

Publication date :

July 2023

Journal title :

Physical Review Fluids

ISSN :

2469-9918

eISSN :

2469-990X

Publisher :

American Physical Society

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://link.aps.org/article/10.1103/PhysRevFluids.8.074001

Funders :

ULiège - Université de Liège
F.R.S.-FNRS - Fonds de la Recherche Scientifique

Funding text :

This work is financially supported by the University of Liège through the CESAM Research Unit and the FNRS CDR project number J.0186.23 entitled “Magnetocapillary Interactions for Locomotion at Liquid Interfaces” (MILLI). Y.C. is financially supported by Grant FNRS PDR T.0129.18.

Available on ORBi :

since 18 November 2023

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