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(a) The pre-hydrogel solution of the composite hydrogel, (b) the final hydrogel, (c–e) the SEM image of the hydrogel after frozen dry and dried at room temperature, (f) the TEM of the AgNPs, (g) the acronym of Chongqing Medical University (CQMU) shaped using the Ag–AV–SF hybrid hydrogel and (h) the EDX spectrum of the AgNPs and elements mapping of the Ag–AV–SF hydrogel
