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. 2022 Jun 26;14(13):2586. doi: 10.3390/polym14132586

Figure 3.

Figure 3

The morphological analysis of the WPD electrodes. The SEM surface image of (a) the WPD electrode layer without PEI and WPD electrode layer; the AFM surface image of (b) the PI substrate, CYTOP coated PI substrate, WPD electrode layer without PEI and WPD electrode layer.