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. 2019 Apr 24;14:2903–2914. doi: 10.2147/IJN.S202625

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© 2019 Guan et al.

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Sample surface characterization and Ag⁺ ions release. (A) FE-SEM images of various surfaces (scale bars =3 μm); (B) corresponding EDS spectrum of various samples; (C) TEM images of Ag-TiO₂@PDA NRDs (scale bars =100 [left panel] and 20 [right panel] nm); (D) Ag-release profiles from Ag-TiO2 NRDs and Ag-TiO₂@PDA NRDs into PBS; (E) water contact angles and photographs of water droplets on various surfaces; (F) XPS spectra of various samples; (F1) C 1s peak of Ag-TiO2 NRDs; (F2) C 1s peak of Ag-TiO₂@PDA NRDs.