A DFT-Based Study of the Low-Energy Electronic Structures and Properties of Small Gold Clusters |
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Authors: | Email author" target="_blank">Prashant?K?JainEmail author |
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Institution: | (1) School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400 |
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Abstract: | Gold clusters Aun of size n = 2–12 atoms were studied by the density-functional theory with an ab-initio pseudopotential and a generalized gradient approximation. Geometry optimizations starting from a number of initial candidate geometries were performed for each cluster size, so as to determine a number of possible low-energy isomers for each size. Along with the lowest-energy structures, metastable structures were obtained for many cluster sizes. Interestingly, a metastable planar zigzag arrangement of Au atoms was obtained for every cluster size n ≥ 5. The stable electronic structure, binding energy, relative stability and HOMO–LUMO gap for the lowest-energy isomer were calculated for each cluster size. Variation of the electronic properties with size is investigated in this paper and compared with experimental results and other calculations. |
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Keywords: | Density-functional theory (DFT) gold nanoclusters ab-initio |
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