910761.fig.008
Figure 8: The absorption spectra A(λ): 1–3: Cu + H2O; 1: 𝜏 a g = 2 min, 𝜏 𝑒 = 40 min; 2: 𝜏 a g = 3 h, 𝜏 𝑒 = 40 min; 3: 𝜏 a g = 1.3 h, 𝜏 𝑒 = 3 h; 4-5: Cu + 0.01 SDS; 4: 𝜏 a g = 10 min, 𝜏 𝑒 = 3 h; 5: 𝜏 a g = 64 h, 𝜏 𝑒 = 3 h; 6–7: Cu + 0.1 SDS; 6: 𝜏 a g = 10 min, 𝜏 𝑒 = 3 h; 7: 𝜏 a g = 19 h, 𝜏 𝑒 = 3 h.