Electromechanical contributions Whenever a solid is strained, electric fields can be generated. One process is due to linear strains, and is called piezoelectricity, the second depends upon how rapidly strains are changing with distance (derivative) and is called flexoelectricity. Both are established science, and can be both measured and calculated using density functional theory methods. Because flexoelectricity depends upon a gradient it can be much larger at the nanoscale during sliding or contact of asperity between two objects.
electromechanical contributions whenever a solid is strained electric fields can be generated one process is due to linear strains and is called piezoelectricity the second depends upon how rapidly strains are changing with distance (derivative) and is called flexoelectricity both are established science and can be both measured and calculated using density functional theory methods because flexoelectricity depends upon a gradient it can be much larger at the nanoscale during sliding or contact of asperity between two objects