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. 2018 May 25;18(6):1713. doi: 10.3390/s18061713

Figure 5.

Figure 5

(a) SEM image of CNT-doped porous PDMS sample; (b) dielectric constants as a function of frequency for TENG with pure PDMS, TENG with undoped porous PDMS, and TENG with CNT-doped porous PDMS.