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Measured droplet heights under various hydrostatic pressures in μHD chip with 1000 μm diameter opening wells. (A) Side-view photographs of a portion of the μHD chip showing protruding droplets of different heights (top: average height = 142.8 μm at 98 N/m2; middle: average height = 215.6 μm at 127.4 N/m2; bottom: average height = 281.2 μm at 147 N/m2; (B) the relationship between the droplet height and hydrostatic pressure. Scale bar is 500 μm.
