CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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High stability of the goldalloy fullerenes:A density functional theory investigation of M12@Au20 (M=Na, Al, Ag, Sc, Y, La, Lu, and Au) clusters |
Zhang Meng(张孟), Feng Xiao-Juan(冯晓娟)†, Zhao Li-Xia(赵丽霞), Zhang Hong-Yu(张红雨), and Luo You-Hua(罗有华)‡ |
Department of Physics, East China University of Science and Technology, Shanghai 200237, China |
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Abstract Discovering highly stable metal fullerenes such as the celebrated C60 is interesting in cluster science as they have potential applications as building blocks in new nanostructures. We here investigated the structural and electronic properties of the fullerenes M12@Au20 (M=Na, Al, Ag, Sc, Y, La, Lu, and Au), using a first-principles investigation with the density functional theory. It is found that these compound clusters possess a similar cage structure to the icosahedral Au32 fullerene. La12@Au20 is found to be particularly stable among these clusters. The binding energy of La12@Au20 is 3.43 eV per atom, 1.05 eV larger than that in Au32. The highest occupied molecular orbital--lowest unoccupied molecular orbital (HOMO--LUMO) gap of La12@Au20 is only 0.31 eV, suggesting that it should be relatively chemically reactive.
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Received: 14 January 2012
Revised: 27 April 2012
Accepted manuscript online:
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PACS:
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61.48.-c
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(Structure of fullerenes and related hollow and planar molecular structures)
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61.46.Bc
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(Structure of clusters (e.g., metcars; not fragments of crystals; free or loosely aggregated or loosely attached to a substrate))
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71.15.Nc
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(Total energy and cohesive energy calculations)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11104075) and the Fundamental Research Funds for the Central Universities of China (Grant No. WM0911005). |
Cite this article:
Zhang Meng(张孟), Feng Xiao-Juan(冯晓娟), Zhao Li-Xia(赵丽霞), Zhang Hong-Yu(张红雨), and Luo You-Hua(罗有华) High stability of the goldalloy fullerenes:A density functional theory investigation of M12@Au20 (M=Na, Al, Ag, Sc, Y, La, Lu, and Au) clusters 2012 Chin. Phys. B 21 056102
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