Nanocrystal gold molecules

Authors

  • Prof. Robert L. Whetten,

    Corresponding author
    1. School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
    • School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Joseph T. Khoury,

    1. School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Dr. Marcos M. Alvarez,

    1. School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Dr. Srihari Murthy,

    1. School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Igor Vezmar,

    1. School, of Physics and Chemistry, and Microelectronics Research Center Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Prof. Z. L. Wang,

    1. School, of Materials Science and Engineering Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Prof. Peter W. Stephens,

    1. Department of Physics State University of New York Stony Brook, NY 11794 (USA)
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  • Dr. Charles L. Cleveland,

    1. School of Physics and Center for Computational Materials Science Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Dr. W. D. Luedtke,

    1. School of Physics and Center for Computational Materials Science Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • Prof. Uzi Landman

    1. School of Physics and Center for Computational Materials Science Georgia Institute of Technology Atlanta, Georgia 30332-043 (USA)
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  • The authors thank A. Wilkinson for discussion of early X-ray measurements; W. B. Carter for permission to mention photoelectron spectroscopic results, M. Duncan, J. Amster, T. P. Martin, and S. Frank for assistance in confirming and extending the mass spectrometry results; M. Shafigullin for help in analyzing structural models; L. Saldana for performing spectroscopic and stability measurements; R. Whyman for stimulating discussions; and R. Andres for communication of results prior to publication. Financial support has been provided by the Georgia Tech Research Foundation, the Packard Foundation and the Office of Naval Research (to RLW), and the U.S. Department of Energy, the National Science Foundation, and the Air Force Office of Scientific Research (to CC, WDL, and UL). Calculations were performed on CRAY computers at the National Energy Research Supercomputer Center, Livermore, California, and at the GIT Center for Computational Materials Science.

Abstract

Gold nanocrystals passivated by self-assembled monolayers of straightchain alkylhiolate molecules have been obtained as highly purified molecular materials of high intrinsic stability. Evidence is presented for a predicted discrete sequence of energetically optimal fcc structures of a truncated octahedral morphological motif (see cover). The nanocrystal materials have a propensity to form extended superlattics, such as that in the Figure.

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