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Fig. 1 | Biomaterials Research

Fig. 1

From: Bioactive self-healing hydrogel based on tannic acid modified gold nano-crosslinker as an injectable brain implant for treating Parkinson’s disease

Fig. 1

Preparation and characterization of oxidized tannic acid (OTA) and oxidized tannic acid modified gold nanoparticles (OTA@Au). A The synthetic diagram of OTA@Au nano-crosslinkers. B The IR spectra of tannic acid (TA) and OTA. C The TEM image of OTA. D The TEM image of OTA@Au. E The UV-visible spectra of TA, OTA, and OTA@Au

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