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. 2018 Nov 2;5:30. doi: 10.1186/s40580-018-0163-0

Fig. 3.

Fig. 3

a SEM image of ZnSnO3 nanocubes and crystal structure characterization using XRD and SAED pattern. b Schematic structure of composite based PENG and output performance by vertical stress using vehicle. c Working mechanism of charge induction by stress-induced poling effect

(Reproduced from [20] with copyright permission from 2014 John Wiley & Sons)