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First-principles study of AuC60 clusters.

Qun Zeng1, Xiang Chu, Xin Wang

  • 1Department of Chemical Engineering, Sichuan University, Chengdu 610065, China.

Journal of Nanoscience and Nanotechnology
|September 12, 2012
PubMed
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This study reveals that one-fold bonding is the most stable configuration for gold-fullerene (AuC60) complexes, challenging previous assumptions about five- or six-fold bonding. These findings offer new insights into the structural preferences of metal-fullerene interactions.

Area of Science:

  • Computational Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Fullerenes (C60) are unique carbon allotropes with diverse applications.
  • Exohedral metal-fullerene complexes are of interest for their novel electronic and structural properties.
  • Understanding the bonding patterns of metal atoms on fullerene surfaces is crucial for designing new materials.

Purpose of the Study:

  • To investigate the geometrical and electronic properties of five distinct exohedral gold-fullerene (AuC60) isomers.
  • To determine the energetically most favorable bonding configuration for gold atoms on C60.
  • To compare the stability and structure of AuC60 complexes with related systems.

Main Methods:

  • Extensive density functional theory (DFT) calculations were employed.

Related Experiment Videos

  • Geometrical optimizations and electronic structure analyses were performed for all isomers.
  • Comparisons were made with anionic, cationic, and hydrogenated AuC60, as well as alkali metal and copper/silver C60 complexes.

    • Main Results:

    • The one-fold bonding configuration of AuC60 was found to be energetically more favorable than the commonly studied five- or six-fold bonding.
    • Similar interaction patterns were observed between AuC60, HAuC60, and charged AuC60 systems.
    • Distinct bonding patterns were identified for alkali metal C60 complexes compared to AuC60.

    Conclusions:

    • The one-fold bonding is the preferred stable structure for exohedral AuC60 complexes.
    • The bonding characteristics of AuC60 are influenced by the charge state and the presence of hydrogen.
    • Alkali metal interactions with C60 exhibit different patterns compared to gold.