Fig. 1.

a Top-view conceptual rendering of a single-stage magnetically actuated immunofluorocytometry microdevice. The paramagnetic beads are pulled by the first magnet into the biotin-FITC sample stream, and then pulled by the second magnet across the channel into the wash stream at a downstream location, followed by fluorescence detection. b Composite micrograph of beads being pulled into biotin-FITC sample stream by first magnet. A bright-field image of beads flowing into the channel is overlaid with an epifluorescent image of the same channel with the biotin-FITC sample stream fluorescing