Colloid interface phenomena
The colloidal particles are irreversibly adsorbed at the fluid interface to lower the interfacial tension, and thus the stable Pickering emulsions can be produced and applied to various industrial fields. The electrostatic force and the capillary force acting between the particles when the particles are present at the fluid interface are abnormally strong. Such interaction forces can be measured quantitatively using optical laser tweezers. By controlling the relative strength of the repulsive and attractive forces, it is possible to control their assembly, microstructure, and rheological properties of the particle-laden interface.