Publications by authors named "Maxime Lavaud"
Observation of Brownian elastohydrodynamic forces acting on confined soft colloids.
Proc Natl Acad Sci U S A
October 2024
Article Synopsis
- The study explores how small particles, like oil droplets, move in complex environments, specifically near rigid surfaces, by investigating the interactions of fluid flow, surface forces, and movement fluctuations.
- It uses advanced techniques like holographic microscopy and statistical analysis to gather detailed data on the Brownian motion of these droplets, achieving high precision in measurements.
- The findings suggest a new type of large, transient force that could play a vital role in microbiological processes, such as transport, search functions, and chemical reactions in crowded settings.
Numerical simulations of confined Brownian-yet-non-Gaussian motion.
Eur Phys J E Soft Matter
March 2023
Brownian motion is a central scientific paradigm. Recently, due to increasing efforts and interests towards miniaturization and small-scale physics or biology, the effects of confinement on such a motion have become a key topic of investigation. Essentially, when confined near a wall, a particle moves much slower than in the bulk due to friction at the boundaries.
View Article and Find Full Text PDFWe study the diffusion of particles confined close to a single wall and in double-wall planar channel geometries where the local diffusivities depend on the distance to the boundaries. Displacement parallel to the walls is Brownian as characterized by its variance, but it is non-Gaussian having a nonzero fourth cumulant. Establishing a link with Taylor dispersion, we calculate the fourth cumulant and the tails of the displacement distribution for general diffusivity tensors along with potentials generated by either the walls or externally, for instance, gravity.
View Article and Find Full Text PDF