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. 2020 Feb 18;10(2):352. doi: 10.3390/nano10020352

Figure 2.

Figure 2

(a) UV–Vis spectrum of a CuS NP-glass sample (red line, absorbance on right axe) compared with the spectrum of the colloidal suspension used for functionalization (blue line, absorbance on left axe); (b) SEM image of the CuS NP-glass sample.