Fig. 4

Time evolution of extinction spectra in aqueous mixtures of (a–c) Hyb1 and (d–f) Hyb2 with AgNO₃ through 3 -1, 6 -2, 9 -3, 21 -4, 36 -5, 60 -6, 72 -7 and 90 min –8 after the introduction of NaBH₄. C_Hyb = 0.5 (a,d), 1.0 (b,e) and 2.0 kg/m³ (c,f); C_AgNO3 = 0.9·10^–2 kg/m³; T = 20 °C.