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app39998-sup-0001-suppfig1.tif511KFigure S1. The macroscopic morphologies of PDMAEMA-CA2 gels swollen in different media (The size of the photos do not represent the real size of the swollen gels.): (a) H2O, (b) pH 1.09, (c) pH 2.16, (d) pH 8.96.
app39998-sup-0002-suppfig2.tif823KFigure S2. SEM images of PDMAEMA-CA2 gels swollen in different media: (a) pH 1.09; (b) pH 2.16; (c) pH 8.96. The scale bares of a, b, c are same, i.e., 100 µm.

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