| 초록 |
The behaviors of colloidal particles at fluid-fluid interfaces are determined by electrostatic and capillary interactions. In general, electrostatic interactions lead to repulsion between the interface-trapped particles, whereas capillary interactions cause attraction between them. To quantitatively understand the relative strength of the two types of the interactions that depend on the particle size, we employ an oil lens system floating on the surface of water where particles reside at a centrosymetrically curved oil-water interface. We fabricate polystyrene particles with controlled size distributions via a microfluidic method. Alternatively, we directly measure the interparticle interaction forces using optical laser tweezers. |
