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. Author manuscript; available in PMC: 2015 Jan 3.
Published in final edited form as: Angew Chem Int Ed Engl. 2013 Oct 15;53(1):184–188. doi: 10.1002/anie.201306282

Figure 1.

Figure 1

a) A representative SEM image showing a PLGA inverse opal scaffold with uniform pores and a long-range ordered structure. The inset shows a magnified view of a pore on the surface, revealing the uniform windows connecting to the pores underneath. Scale bar: 100 μm. b, c) Optical micrographs showing (b) a pristine PLGA inverse opal scaffold and (c) a PLGA inverse opal scaffold after doping with MTT formazan to render it purple in color. d) UV-vis extinction spectra of hemoglobin, deoxy-hemoglobin, and MTT formazan crystals. Formazan has an absorption peak at approximately 650 nm, while blood does not show strong absorption at >600 nm.