Tunable Cu₂O Nanocrystals Fabricated by Free Dealloying of Amorphous Ribbons

Figure 2

SEM images of the Cu_52.5Hf₄₀Al_7.5 amorphous ribbon etched in different acid solutions (a) 0.5 M HF for 4 min; (b–f) 0.05 M HCl for (b) 6 h, (c) 8 h, (d) 14 h, (e) 20 h, and (f) 24 h; (g-h) EDS analysis in (f): (g) point A (h) point B.

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