Abstract
Gold clusters exhibit strong size and charge state dependent variations in their properties. This is demonstrated by significant changes in their geometric structures and also in their chemical properties. Here we focus on clusters containing up to about 20 gold atoms and briefly review their structural evolution emphasising the role of isomerism and structural fluxionality. The discussion of chemical properties is limited to the interaction of gold clusters with molecular oxygen and carbon monoxide, separately, and their interaction in CO/O2 co-adsorbates on gold clusters eventually leading to CO oxidation. Whilst highlighting results obtained using different experimental approaches, special attention is given to the insights obtained using infrared multiple photon dissociation (IR-MPD) spectroscopy.
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