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Free keywords:
Granular packing, Granular materials
Abstract:
Equal volume mixtures of small and large polytetrafluorethylene spheres are shaken in an atmosphere of
controlled humidity which allows one to also control their tribocharging. We find that the contact numbers are
charge dependent: As the charge density of the beads increases, the number of same-type contacts decreases and
the number of opposite-type contacts increases. This change is not caused by a global segregation of the sample.
Hence, tribocharging can be a way to tune the local composition of a granular material.
