Fig. 9
From: Precise control of alloying sites of bimetallic nanoclusters via surface motif exchange reaction
Enhanced stability of Ag@Au nanoclusters. Ultraviolet–visible absorption spectra of a [Ag44(SR)30]4− and b, c [Ag32Au12L30]4− nanoclusters incubated in an elongated period (a, b, at room temperature) and at varied temperature (c, incubation time = 2 h). The ligand (L) is thiolate (SR) or halogen (e.g., Cl). The arrows in b, c indicate the absorption features of [Ag32Au12L30]4− at 390 and 490 nm. Clusters in a, b were dissolved in 1 wt.% CsOH aqueous solution, while those in c were dissolved in dimethylformamide
