Figure 9.
(a) Schematic depicting the structure of photopolymerized PEG hydrogels with dense extended crosslink junctions spaced 6 - 16 nm apart. The thick dark lines represent the crosslink junctions and the lighter lines represent the PEG chains. These junctions are spaced uniformly enough such that there is a correlation peak in the SAXS pattern. Photopolymerized PEG networks are generated with either (b) diacrylate or (c) diacrylamide end-groups.