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(a) Schematic illustration of a i-TENG-powered pacemaker prototype (b) Electrical circuit of the i-TENG-powered pacemaker prototype. (c) Stimulating voltage generated by the self-powered pacemaker. Insets: regulated heart beating of a rat in response to the pacemaker. Reprinted with permission from Zheng et al., Adv. Mater. 26(33), 5851 (2014). Copyright 2014 Wiley-VCH.
