Publications

Etching and aging effects in nanosize Au clusters investigated using high resolution size-exclusion chromatography

Wilcoxon, Jess P.; Wilcoxon, Jess P.; Provencio, P.N.

Experiments using high-resolution size exclusion chromatography (HRSEC), dynamic light scattering, and transmission electron microscopy are conducted to investigate the effects of aging of Au nanoclusters in the presence of surfactant ligands. It is observed that contrary to the expectation that aging in solution will always broaden the size dispersion and increase the average size (Ostwald ripening), a narrowing of the size dispersion and change in average size can occur with time under ambient conditions.