Figure 4.
Fluorescence photomicrographs using methacrylated rhodamine to show micropatterns in 7% MA hydrogels: (a) 100 μm checkerboard, scale bar = 200 μm; (b) 250 μm stripes, scale bar = 500 μm, and (c) 200 μm islands, scale bar = 500 μm. Red indicates coupled methacrylated rhodamine, which demonstrates where UV crosslinking occurred. (d) Patterned surface swelling in 11% MA hydrogel patterned with 250 μm stripes, after 48 h incubation in media at 4 °C.