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. 2019 Dec 18;11(1):7. doi: 10.3390/mi11010007

Figure 8.

Figure 8

(a) The schematic of an electrostatic energy harvester. Adapted with permission from Lu et al. [134]. (b) An electret energy harvester. Adapted with permission from Tao et al. [135]. (c) The SEM with a false-color of a piezoelectric energy harvester. Adapted with permission from Toprak et al. [136]. (d) The schematic of an electromagnetic energy harvester. Adapted with permission from Sardini et al. [137]. (e) Hybrid energy harvester with the piezoelectric and electromagnetic mechanism. Adapted with permission from Yan et al. [138].