Surface charge

Multiple layers of negative charge accumulate near a positively charged surface to form a double layer.

A simplified overlay of multiple layers of ions, and electric potential with increasing Debye length. The first layer of absorbed ions is referred to as the inner Helmholtz plane. Next is a layer of non-specifically absorbed, hydrated counterions which represent an outer Helmholtz plane.[1]

Diagram depicting electro-osmosis through a glass capillary submerged in an aqueous solution.

Surface charge is the electrical potential difference between the inner and outer surface of the dispersed phase in a colloid. There are many different processes which can lead to a surface being charged, including adsorption of ions, protonation/deprotonation, and the application of an external electric field. Surface charge causes a particle to emit an electric field, which causes particle repulsion and attraction, affecting many colloidal properties.

单词	Surface potential
释义	Surface potential 英语百科 Surface charge Surface charge is the electrical potential difference between the inner and outer surface of the dispersed phase in a colloid. There are many different processes which can lead to a surface being charged, including adsorption of ions, protonation/deprotonation, and the application of an external electric field. Surface charge causes a particle to emit an electric field, which causes particle repulsion and attraction, affecting many colloidal properties.
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Surface potential

Surface charge