“…Under the influence of this potential, the flow of electrons can be realized to balance the potential. Again, during the recontact of the two layers, the backflow of electrons under the reverse potential can be expected. , Further, the role of the piezoelectric PVDF-HFP layer in enhancing contact electrification was verified upon changing the contacting layer to Al, cellulose paper, nitrile, or Teflon (poly(tetrafluoroethylene)PTFE). As shown in Figure (d), when different counter layers are in contact with ZnO nanorods, diverse outputs can be obtained depending upon the tendency of the layer to attract electrons.…”