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Optical (A–C) and the corresponding transmission electron microscopic (TEM) images (D–F) of the solution of 8a with [8a] = 1.0 wt % (A, D); the solution of 8a at 5 min after the addition of alkaline phosphatase (ALP) (B, E); and the hydrogel of 8b overnight after the addition of ALP (C, F). Adapted with permission from ref.22. Copyright ACS 2009.
