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, 318 (5849), 430-3

Structure of a Thiol Monolayer-Protected Gold Nanoparticle at 1.1 A Resolution

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Structure of a Thiol Monolayer-Protected Gold Nanoparticle at 1.1 A Resolution

Pablo D Jadzinsky et al. Science.

Abstract

Structural information on nanometer-sized gold particles has been limited, due in part to the problem of preparing homogeneous material. Here we report the crystallization and x-ray structure determination of a p-mercaptobenzoic acid (p-MBA)-protected gold nanoparticle, which comprises 102 gold atoms and 44 p-MBAs. The central gold atoms are packed in a Marks decahedron, surrounded by additional layers of gold atoms in unanticipated geometries. The p-MBAs interact not only with the gold but also with one another, forming a rigid surface layer. The particles are chiral, with the two enantiomers alternating in the crystal lattice. The discrete nature of the particle may be explained by the closing of a 58-electron shell.

Comment in

  • Chemistry. Nano-golden order.
    Whetten RL, Price RC. Whetten RL, et al. Science. 2007 Oct 19;318(5849):407-8. doi: 10.1126/science.1150176. Science. 2007. PMID: 17947573 No abstract available.
  • Material witness: golden wonder.
    Ball P. Ball P. Nat Mater. 2007 Dec;6(12):927. doi: 10.1038/nmat2070. Nat Mater. 2007. PMID: 18059298 No abstract available.

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