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. 2021 May 28;9:688442. doi: 10.3389/fchem.2021.688442

FIGURE 5.

FIGURE 5

Characterization of MNPs30-COOH, MNPs30-NH2, Ag NPs, Ag-MNPs30-COOH, and Ag-MNPs30-NH2 by transmission electron microscope (TEM). (A) The shape of MNPs30-COOH. (B) The shape of MNP30-NH2. (C) The appearance of Ag-MNPs30-COOH. (D) The appearance of Ag-MNPs30-NH2.