Figure 4.
Top-view of a z-stack of confocal fluorescence microscopy images of the microchannels in PAAm hydrogels. The images present channels resulting from tetrapod scaffolds with different network densities and diameters. (A–C) Samples produced by using tetrapods with larger diameters, (D–F) samples produced using thinner tetrapods. Each column of images pictures samples from one ZnO density in the tetrapod template. Namely (A, D) 0.3, (B, E) 0.6, and (C, F) 1 g/cm3. It becomes clear that the ranges of channel diameters and densities are influenced by these respective parameters of the sacrificial ZnO template and can hence be controlled by adapting the template properties.