Figure 5.

(a) XRD spectra of the materials resulting from degradation at 60 °C after 7 days in SBF (b) HRTEM image showing the polycrystalline nature of the degradation byproducts (inset is a DFT image). (c) HRTEM image with higher magnification of a degradation byproduct. (d) Precipitation of sulfates with barium sulfate to demonstrate their presence using (A) Na₂(SO₄) as control, (B) degraded byproducts from the CuS NPs under the presence of the barium sulfate, and (C) without barium sulfate. (e) Precipitation of copper(II) ions with sodium hydroxide to demonstrate their presence: (D) degraded byproducts from the CuS NPs without NaOH and (E) with NaOH.