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The image of (a) the control chip with bare silica beads and (b) the experimental chip with probe-functionalized silica beads packed within a small chamber in the microfluidic channel after passing fluorescently labeled target green crab ssDNA through both the chips, respectively, is recorded using a digital camera attached to a Clare Chemical DR-45M dark reader. (c) The fluorescence image of the control and (d) the experimental chip recorded by a confocal laser scanning microscope.
