Gouy-Chapman Model

The Gouy-Chapman model describes how electric charges distribute near a charged surface immersed in an electrolyte (a solution with ions). It explains that ions in the solution are attracted or repelled by the charged surface, forming a layer called the electric double layer. This layer screens the surface’s charge, reducing its influence with distance. The model predicts how the potential and ion concentration change close to the surface, considering thermal motion and electrostatic forces. It is fundamental in understanding phenomena like colloidal stability, electrochemistry, and the behavior of biological membranes.