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. 2021 Jan 6;12(1):60. doi: 10.3390/mi12010060

Figure 4.

Figure 4

(a) CV comparisons of WE surfaces containing CeO2 nanoparticles using three stamping methods and the control device and optical microscope image of (b) sequence stamping, (c) mixing and stamping; and (d) droplet spraying and stamping. The shining finger-like feature in (bd) is the Au conductive layer.