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PDMS mold (A) employed for stamping microwell arrays in polystyrene-based Petri dish by hot embossing and presenting three arrays of 42 pits (200 μm height; 400 μm diameter, and 800 μm spacing). (B). Picture of a Petri dish after hot embossing of the microwell array. (C) Microscopy picture showing 21 independent wells in the polystyrene substrate.
