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Magnetically activated Ni-patterned microfluidic device showing (a) fabrication of the micropad array on the platform; (b) schematic diagram of the magnetic platform, composed of a micromagnet array, a microfluidic channel, and a permanent magnet. The inset picture is the micromagnet array. The size of each pad is 50 μm ×50 μm (scale bar is 100 μm).
