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Nano Convergence
Fig. 2 | Nano Convergence

Fig. 2

From: 3D-printed wound dressing platform for protein administration based on alginate and zinc oxide tetrapods

Fig. 2

Morphological, structural and chemical analysis of the tetrapodal zinc oxide. A and B SEM micrograph of the tetrapods. The four arms protruding at fixed angles are visible in A, the hexagonal shape of each arm is visible in B. C A photograph of the t-ZnO powder. D Micro-Raman spectrum of alginate, zinc oxide and composites of 5% and 15% t-ZnO in alginate. E Enlarged micro-Raman spectrum of t-ZnO. Some characteristic peaks are marked with read lines and their corresponding wavenumber. F Diffractogram of the t-ZnO powder. The reflexes found indicate the crystallinity of the t-ZnO. G–I Optical micrographs of alginate-based inks with concentrations of 0%, 5% and 15% t-ZnO. J–L SEM micrographs of the alginate-based inks after lyophilization. The tetrapodal arms sticking out of the dried hydrogel can be clearly observed for K (5% t-ZnO) and L (15% t-ZnO)

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