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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: APL Mater. 2017 Mar;5(7):073801. doi: 10.1063/1.4978936

FIG. 9.

FIG. 9

(a) Electrical outputs of TENGs by pairing any two from the four kinds of BDPs as the friction layers. ((b) and (c)) Cross section image (b) and reconstruction image (c) of micro-computer-topography (CT) of BD-TENG after a 9-week implantation. Most parts of the BD-TENGs were biodegraded in the body. (d) Voltage outputs of BD-TENGs coated in PVA and PLGA as a function of time. Reprinted with permission from Zheng et al., Sci. Adv. 2(3), e1501478 (2016). Copyright 2016 American Association for the Advancement of Science.