Figure 1.

Images showing the design and use of a serpentine microfluidic network for focusing for 2 µm red fluorescent spheres. a) A schematic top view of the entire inertial focusing platform. The total length of the serpentine curved microchannel section is 4.5 cm in this design. b) Enlarged image of the serpentine curved channel. b′) Fluorescence image of the 2 µm red fluorescence particles streams in locations corresponding to (b). c) Magnified image of one serpentine unit, in which the channel width of the small bend is 20 µm and the width of the large bend is 80 µm. c′) Fluorescence images of the focused 2 µm red fluorescence particle stream at a location corresponding to (c). d) Magnified image of the isolation region. d′) Fluorescence images of the focused 2 µm red fluorescence particle stream in the isolation region. The white dashes represent the boundaries of microchannels.