Proton Conductor
https://en.m.wikipedia.org/wiki/Proton_conductor
Acid solutions exhibit proton-conductivity, while pure proton conductors are usually dry solids. Typical materials are polymers or ceramic. Typically, the pores in practical materials are small such that protons dominate direct current and transport of cations or bulk solvent is prevented.
Triboluminescence
https://en.m.wikipedia.org/wiki/Triboluminescence
Triboluminescence is phenomenon in which light is generated when a material is mechanically pulled apart, ripped, scratched, crushed, or rubbed (see tribology). The phenomenon is not fully understood, but appears to be caused by the separation and reunification of static electrical charges.
Casimir Effect
https://en.m.wikipedia.org/wiki/Casimir_effect
In quantum field theory, the Casimir effect is a physical force acting on the macroscopic boundaries of a confined space which arises from the quantum fluctuations of the field.
