title: Nanoscale deformation of a liquid surface.
abstract: We study the interaction between a solid particle and a liquid interface. A semianalytical solution of the nonlinear equation that describes the interface deformation points out the existence of a bifurcation behavior for the apex deformation as a function of the distance. We show that the apex curvature obeys a simple power-law dependency on the deformation. Relationships between physical parameters disclose the threshold distance at which the particle can approach the liquid before capillarity provokes a "jump to contact." A prediction of the interface original position before deformation takes place, as well as the attraction force measured by an approaching probe, are produced. The results of our analysis agree with the force curves obtained from atomic force microscopy experiments over a liquid puddle.
authors.affiliation: Université de Toulouse, INPT, UPS, CNRS, IMFT (Institut de Mécanique des Fluides de Toulouse), Allée Camille Soula, F-31400 Toulouse, France.
authors.forename: Rene
authors.initials: R
authors.lastname: Ledesma-Alonso
authors.forename: Dominique
authors.initials: D
authors.lastname: Legendre
authors.forename: Philippe
authors.initials: P
authors.lastname: Tordjeman
mesh_terms: D002627:Chemistry, Physical / Q000379:methods*; D007700:Kinetics; D018625:Microscopy, Atomic Force / Q000379:methods; D008956:Models, Chemical; D036103:Nanotechnology / Q000379:methods*; D017711:Nonlinear Dynamics; D013499:Surface Properties