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. 2017 Dec 8;9(12):690. doi: 10.3390/polym9120690

Figure 9.

Figure 9

Optical microscope images for surface contact performance of plateau electrode. (a) An air bubble is trapped in the recessed electrode due to the hydrophobicity of the PDMS surface. (b) As there is no gap between the slide glass and electrodes, air bubbles are not seen on plateau electrodes.