Colloidal alloy superlattices of two different nanoclusters are demonstrated here for the first time. Thiol-functionalized Ag and Au nanoclusters were prepared separately in toluene before mixing and solvent evaporation. For certain Au/Ag proportions, the particles spontaneously self-organized into ordered 2D arrays, which can be seen in the bright field STEM image in the Figure.
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Kiely et al. (2000) studied this question.
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