Tribocharge, otherwise known as triboelectric charge or tribocharging, is the generation of electrostatic charges by the rubbing or separating of surfaces. The molecules in the two materials interact, forming an electrical bond. Separating the materials creates friction. This frictional force draws electrons away from one material and deposits an excess of electrons on the other, leaving a positive or negative electrical charge on both materials.
The amount of charge created by triboelectric generation is affected by the area of contact, the speed of separation, relative humidity, the chemistry of the materials, surface work function, and other factors.
An electrostatic charge may also be created on the material in other ways, such as by induction, ion bombardment, or contact with another charged object. However, triboelectric charging is the most common.
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