Fig. 2. Temperature-controlled transient stability of AuNP assemblies. (a) Recovery of the absorbance at 420 nm of a 0.1 mM photoacid solution after 5 min irradiation. (b) Half-life of the recovery process in (a). Dashed curve: Exponential fitting. (c) Change of absorbance at 800 nm of the AuNP/photoacid mixture after 5 min irradiation. The recovery time (t1) is exemplified for 40 °C. (d) The recovery time of the AuNPs vs. the half-life of the photoacid recovery. Dashed line: linear fitting. Irradiation for (a) and (c): 25 mW cm−2 at 455 nm. Irradiation stops at t = 1 min.
