Figure 2. SEM images and LIBS spectra of NPs.
SEM images of: (a) Ag NPs; (b) Cu2O NPs; (c) MgO NPs; (d) ZnO NPs. LIBS spectra of: (e) Ag NPs; (f) Cu2ONPs; (g) MgO NPs; (h) ZnO NPs. Scale bars are 200 nm for all SEM images.
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