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. 2019 Dec 16;22(1):8. doi: 10.1007/s10544-019-0456-z

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© The Author(s) 2020

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Fig. 3 — a Microscope image of the sample before the wetting test. b–h Liquid front movement in the guiding channel, captured every 30 s following liquid deposition at the bottom of the guiding channel (b) until complete evaporation of the liquid (H)