Fig. 1

Dielectric-based triboelectric device and dielectric polarization: a Theoretical models for parallel-plate contact-modes and equivalent circuit diagram for dielectric-to-dielectric and conductor-to-dielectric TENG (Reproduced from Ref. [21]. Copyright 2014 Royal Society of Chemistry). b Real (ε') and imaginary part (ε") of the dielectric constant as a function of frequency in a polymer having interfacial, orientational, ionic, and electronic polarization mechanisms (Reproduced with permission from Ref. [32, 33]. Copyright 2012 American Chemical Society)