Figure 4
From: Self-powered bifunctional sensor based on tribotronic planar graphene transistors
(a) PPF behavior of triboelectric graphene synaptic device under sequent-dual-pulse stimuli (triboelectric distance = 200 μm, spike time interval Δtpre = 60 ms, spike tension time = 10 ms) left panel: EPSC of device under sequent double-pulse stimuli. Right panel: PPF of device under varied tension time of sequent double-pulse stimulis. (b) The EPSC of device under varied frequency of dual-spike pulse wind serve as triboelectric pulse (4 Hz–16 Hz) (left panel). The corresponding extracted frequency-dependent PPF (right panel). (c) The mechanism for PPF behaviour.
