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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Biomaterials. 2009 Dec 24;31(9):2686. doi: 10.1016/j.biomaterials.2009.12.012

Figure 3. Long-range gradients of particles, cells and materials.

Figure 3

SEM images at low and high magnification of freeze-dried A) PEG-DA hydrogel gradient and B) collagen gradient. Microscope images of C) endothelial cell gradient and D) fluorescent particle gradient (diameter 5 μm). E) Quantification of the continuous variance in thickness of the hydrogel gradient and relative density profiles of endothelial cell gradient and fluorescent particle gradient (with diameters of 5, 10 μm).