Extended Data Fig. 3: Time evolution of the contact bias.
From: Spontaneous ordering of identical materials into a triboelectric series
We prepare pristine samples and start by biasing sample A against B with 100 contacts and then proceed to measure the charge exchange between A and samples C–N in certain time intervals. We observe a slight decay in the charge exchange over a scale of days, although it is still much larger than the charge exchange for pristine samples (grey area).
