  By rigorously accounting for mesoscale spatial correlations in donor/acceptor
surface properties, we develop a scale-spanning model for same-material
tribocharging. We find that mesoscale correlations affect not only the
magnitude of charge transfer but also the fluctuations-suppressing otherwise
overwhelming charge-transfer variability that is not observed experimentally.
We furthermore propose a generic theoretical mechanism by which the mesoscale
features might emerge, which is qualitatively consistent with other proposals
in the literature.
