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. 2018 Nov 13;9(11):593. doi: 10.3390/mi9110593

Figure 2.

Figure 2

(a) Contact angle and (b) VOC output depending on the number of top coats applied. Peak VOC value of sprayed-on triboelectric nanogenerator (TENG) with (c) 2 top coats and (d) 4 top coats.