Study of Structural Evolution and Electronic Properties of Aun- Ionic Clusters
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Abstract
The structural evolution and electronic properties of Aun- clusters have been studied using density functional theory at the PW91/TZVPP level. The results indicate that all the ground state clusters possess a planar configuration and its growth patterns display an odd-even effect, namely, combined with an Au atom on the high symmetry direction, the Aun- cluster with odd n can form the Aun+1- cluster by a small relaxation. Simultaneously, the calculated ionization potential based on the ground state is good agreement with experimental value. The energy second-order difference and energy gap show same odd-even oscillation. This implies that the Aun- clusters with odd n have higher physical and chemical stability than that with even n.
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