Figure 4
From: The Charging Events in Contact-Separation Electrification
Analysis of electrical potential signals of consecutive contact/separation cycles upon metal-polymer contact. (Here, data shown for PP on BE-Aluminum as ME, at 1 Hz). (a) Overall signals generated at the first three contact/separation cycles. (b) Signals for PP (BE), and (c) signals for Al (ME). Individual events of electrostatic induction upon approach (Ia), contact electrification (CE), separation (SE), and electrostatic induction upon departure (Id) are labelled. As expected, Ia signal is missing at the first contact, and Id appears after first SE (since the surfaces becomes charged already after SE).
