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(A) Demonstration of the facile preparation of ZW/GDL hydrogels at different pH. (B) B1, B2, B3, and B4 refer to SEM images obtained at pH 5.0, 5.5, 6.0, and 6.5, respectively (scale bar: 100 nm). (C) strain-dependent sweep, and (D) dynamic frequency sweep of hydrogels at pH 6.5, pH 6.0, pH 6.0, and pH 5.0.
