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Tall pillar structures in Au-epoxy masters. (a) Photograph of a Au-epoxy master with pillars within a 100 mm petri dish. (b) SEM image of a section of the pillar and relief features on the Au-epoxy master. (c) PDMS device molded from a Au-epoxy master with pillars and assembled onto coverglass. Food coloring was used to highlight the cell compartments.
