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(a) A microbatch chip mounted on the 14-ID-B beamline at BioCARS, oriented at −30° towards the high resolution camera. (b) Photograph of a counter-diffusion chip that has been filled with blue and red food dye to simulate on-chip mixing. Optical micrographs under crossed-polarizers showing HEWL crystals grown in a (c) microbatch and (d) counter-diffusion chip. Crystals from 50–500 μm formed overnight. The inset shows a close-up view of selected crystals.
