Diffusion of gold ions and gold particles during photoreduction processes probed by the transient grating method

Time dependence of the TG signal (ITG) in water/ethanol (1/1) solutions with PVP observed (a) before and (b to d) after the photoirradiation of AuCl−4, and the schematic illustration of the photoreduction process of the AuCl−4-containing solution.