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Pré-Publication, Document De Travail Année : 2020

Surface Force Measurements Using Brownian Particles

Résumé

Brownian motion in confinement and at interfaces is a canonical situation, encountered from fundamental biophysics to nanoscale engineering. Using the Lorenz-Mie framework, we optically record the thermally-induced tridimensional trajectories of individual microparticles, within water, and in the vicinity of a rigid wall. Based on this data, we implement a novel, robust and self-calibrated multifitting method, allowing for the thermal-noise-limited inference of spatially-resolved diffusion coefficients, equilibrium potentials, and forces -- at the femtoNewton resolution.
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Dates et versions

hal-03047058 , version 1 (08-12-2020)
hal-03047058 , version 2 (28-04-2021)

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Maxime Lavaud, Thomas Salez, Yann Louyer, Yacine Amarouchene. Surface Force Measurements Using Brownian Particles. 2020. ⟨hal-03047058v1⟩
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