Trapping energy of a spherical particle on a curved liquid interface
Language
en
Article de revue
This item was published in
Journal of Colloid and Interface Science. 2013-09-01, vol. 405, p. 249-255
Elsevier
English Abstract
We derive the trapping energy of a colloidal particle at a liquid interface with contact angle θ and principal curvatures c1 and c2. The boundary conditions at the particle surface are significantly simplified by introducing ...Read more >
We derive the trapping energy of a colloidal particle at a liquid interface with contact angle θ and principal curvatures c1 and c2. The boundary conditions at the particle surface are significantly simplified by introducing the shift ε of its vertical position. We discuss the undulating contact line and the curvature-induced lateral forces for a single particle and a pair of nearby particles. The single-particle trapping energy is found to increase with the square of the mean curvature c1 + c2 and to decrease with the square of the anisotropy c1 − c2. Thus particles on a minimal surface (c1 + c2 = 0) move toward strongly curved regions, whereas on a deformed droplet they migrate to flatter areas.Read less <
Keywords
liquid interface
trapping energy
colloidal particles
Soft matter
Origin
Hal imported