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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. 1 — Computer-aided designs of (a) a single microstructure (top and side view); (b) microstructures and the distances between them in different directions; (c) the whole test sample - T channel and two MNs – structured (S) and non-structured (N). Optical microscope images of (d) an individual microstructure; (e) several microstructures, and (f) the whole test sample