Figure 2.

SEM micrograph of (a) PDMS mold for plastic casting and (b) the epoxy chip fabricated by casting (reprinted with permission [37] ^© 2007 Springer); (c) Schematic of the casting method showing an elastomer material poured over a molding template, peeled off, and sealed with an appropriate substrate, such as glass or silicon, to form microfluidic channels.