Figure 3.

(a) UV–vis spectra, (b) ATR-FTIR, and (c) X-ray diffraction patterns for Cu₂ONP prepared in a VFD under continuous flow of water at a flow rate of 0.25 mL/min with the tube inclined at 45°, rotating at 7.5 k rpm, and irradiated with a 1064 nm-pulsed laser operating at 600 mJ. Analogous data were obtained for CuONPs prepared from a dispersion of Cu₂ONPs heated to 50 °C for 10 h.