The role of electrostatic charge in the adhesion of spherical particles onto planar surfaces in atmospheric systems

Adhesion force microscopy is sensitive to the charge distribution at the surface of single collagen fibrils

“…In the case of a conductive tip and a conductive or naturally charged surface like mica, a voltage bias can be used to increase the adhesion force by several orders of magnitude through the attractive electrostatic interaction of opposite charges. 16 This effect has previously been observed on a hydrophilic surface at a low relative humidity of below 40% RH even in the presence of water absorption and the associated screening of the electric potential. 16 In the absence of a voltage bias and at low relative humidity, it is still expected that the adhesion force between a charged silicon tip and a charged surface should depend on the spatial distribution of charges.…”

Transparent superhydrophilic and superhydrophobic nanoparticle textured coatings: comparative study of anti-soiling performance

“… 29 For example, for hydrophilic surfaces, excessive water adsorption attenuates the surface charge by providing a path for leakage, which might cancel out the electrostatic force, leading to a reduction in the adhesive force. 29 …”

“…The adhesion force between a particle and a substrate can be expressed in terms of van der Waals (vdW), electrostatic, and capillary forces. [27][28][29][30][31] The contribution of the capillary force can be signicant when water is present between the interacting surfaces as a result of water condensation on the surface of the coating. The SP and SPH coatings were tested in a dry environment.…”

“…Because of strong capillary condensation, the adhesion force between particle and substrate generally increases with an increase in humidity. 29,31 However, the humidity effect is more complicated because of the interaction between electrostatic force and capillary force associated with the surface chemistries of particles and substrates. 29 For example, for hydrophilic surfaces, excessive water adsorption attenuates the surface charge by providing a path for leakage, which might cancel out the electrostatic force, leading to a reduction in the adhesive force.…”

Dependence of Interfacial Adhesion between Substances on Their Electron Work Functions

“…According to the Gaussian’s law, E is expressed as where E is the electrical field in vacuum, and ε (for air ∼1.0) and ε 0 (8.854 × 10 –12 F/m) are the relative permittivity and absolute permittivity in vacuum, respectively. The attractive electrostatic pressure P A in a non-vacuum medium can be correlated to the adhesive force F Ad , expressed as ,, …”