Why Does Electroosmotic Flow Occur?

Electroosmotic flow occurs when an applied driving voltage interacts with the net charge in the electrical double layer near the liquid/solid interface resulting in a local net body force that induces the bulk liquid motion.

What is electroosmotic flow Why does it occur?

Electroosmotic flow occurs because the walls of the capillary tubing are electrically charged. The surface of a silica capillary contains large numbers of silanol groups (–SiOH). At pH levels greater than approximately 2 or 3, the silanol groups ionize to form negatively charged silanate ions (–SiO^–).

How is electroosmotic flow generated?

Electroosmotic flow is caused by the Coulomb force induced by an electric field on net mobile electric charge in a solution. ... The resulting flow is termed electroosmotic flow.