We report high-pressure liquid chromatography (HPLC) and transmission electron microscopy (TEM) studies of the size distributions of nanosize gold clusters dispersed in organic solvents. These metal clusters are synthesized in inverse micelles at room temperature, and those investigated range in diameter from 1 to 10 nm. HPLC is sensitive enough to discern changes in hydrodynamic volume corresponding to only 2 carbon atoms of the passivating agent or metal core size changes of less than 4 Å. We have determined for the first time how the total cluster volume (metal core + passivating organic shell) changes with the size of the passivating agent.
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Wilcoxon et al. (2000) studied this question.
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