Observation of Brownian elastohydrodynamic forces acting on confined soft colloids - Laboratoire Ondes et Matière d'Aquitaine Access content directly
Preprints, Working Papers, ... Year : 2024

Observation of Brownian elastohydrodynamic forces acting on confined soft colloids

Abstract

Confined motions in complex environments are ubiquitous in microbiology. These situations invariably involve the intricate coupling between fluid flow, soft boundaries, surface forces and fluctuations. In the present study, such a coupling is investigated using a novel method combining holographic microscopy and advanced statistical inference. Specifically, the Brownian motion of soft micrometric oil droplets near rigid walls is quantitatively analyzed. All the key statistical observables are reconstructed with high precision, allowing for nanoscale resolution of local mobilities and femtonewton inference of conservative or non-conservative forces. Strikingly, the analysis reveals the existence of a novel, transient, but large, soft Brownian force. The latter might be of crucial importance for microbiological and nanophysical transport, target finding or chemical reactions in crowded environments, and hence the whole life machinery.
Fichier principal
Vignette du fichier
Fares2024.pdf (1.54 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04581010 , version 1 (21-05-2024)

Identifiers

  • HAL Id : hal-04581010 , version 1

Cite

Nicolas Fares, Maxime Lavaud, Zaicheng Zhang, Aditya Jha, Yacine Amarouchene, et al.. Observation of Brownian elastohydrodynamic forces acting on confined soft colloids. 2024. ⟨hal-04581010⟩

Collections

CNRS LOMA ANR
0 View
0 Download

Share

Gmail Mastodon Facebook X LinkedIn More