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(A) Conventional punching vs. (B) micromechanical punching; (C) do-it-yourself punching using Playdough® and Lego® block showing the basic steps of the MMP process: (i) sample preparation, (ii) MMP, (iii) demolding the mold from the microparticle layer, and (iv) microparticles obtained on the deformable substrate after peeling off the surrounding punched film (Green: Hard mold; red: Microparticle layer; blue: Deformable substrate).
