Total Structure and Electronic Properties of the Gold Nanocrystal Au36(SR)24

Authors


  • R.J. thanks financial support by the Air Force Office of Scientific Research under AFOSR Award No. FA9550-11-1-9999 (FA9550-11-1-0147) and the Camille Dreyfus Teacher-Scholar Awards Program. The work of B.Y., R.N.B., and U.L. was supported by the Office of Basic Energy Sciences of the US Department of Energy under Contract No. FG05-86ER45234, and in part by the Air Force Office of Scientific Research (AFOSR). Calculations were performed at the Georgia Tech Center for Computational Materials Science. We thank Dr. Zhongrui Zhou for assistance in ESI-MS analysis.

Abstract

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A golden opportunity: The total structure of a Au36(SR)24 nanocluster (see figure) reveals an unexpected face-centered-cubic tetrahedral Au28 kernel (magenta). The protecting layer exhibits an intriguing combination of binding modes, consisting of four regular arch-like staples and the unprecedented appearance of twelve bridging thiolates (yellow). This unique protecting network and superatom electronic shell structure confer extreme stability and robustness.

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