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. 2017 Oct 11;17(10):2312. doi: 10.3390/s17102312

Figure 31.

Figure 31

(a) AFM image from a [PAH+HTTPS/PAA] coating (left hand side image) and one with a hydrophilic coating deposited below (right hand side image); (b) the second one shows a higher roughness that enhances the sensitivity of the sensor. Reprinted from [155] with permission from Elsevier.