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. 2014 May 27;136(25):9061–9069. doi: 10.1021/ja5032634

Figure 5.

Figure 5

Results of competitive etching experiments on mixtures of Cu2–xSe and Cu2–xS NCs. (a,b) HAADF-STEM images of a mixture of Cu2–xSe and Cu2–xS NCs (a) as-synthesized and (b) after exposure of the same grid to CuCl2 methanol solution for 10 s (the inset represents EDS mapping of Se (magenta) and S (yellow) for the region within the box). (c) Comparison of XRD spectra for a mixture of Cu2Se and Cu2–xS NCs before and after 1 min immersion in a CuCl2 solution, compared with berzelianite Cu2Se (PDF card no. 01-088-2043) and djurleite Cu31S16 (PDF card no. 230959) reference patterns.