%0 Conference Paper
%F Oral 
%T Contact angle of submicron particles
%+ Laboratoire Charles Coulomb (L2C)
%A Stocco, Antonio
%< avec comité de lecture
%Z L2C:12-397
%B Max Planck Institute of Colloids and Interfaces Summer school (Interface dept.),
%C Lecce, Italy
%8 2012-10-04
%D 2012
%Z Chemical Sciences/Polymers
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]
%Z Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]Conference papers
%X Colloid and interface science has been developed in many aspects and now many phenomena taking place in the colloidal scale and/or at the interface are well described by theory and fully addressed by experiments. However, some fundamental and "old" problems have remained unsolved up to now. Here, I would like to address the "simple" case of contact angles (CAs) of submicron particles at the water interface. Is the macroscopic CA, measured by the wetting angle of a water drop on a macroscopic substrate, the same as the CA of a submicron particle at the water interface? In this presentation, I will explain how to measure in-situ CAs of colloidal particles at the fluid interface using ellipsometry, compare different CAs measurements and discuss the role of electrostatics at the water surface.
%G English
%L hal-00828122
%U https://hal.science/hal-00828122
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021