Three-dimensional hexagonal close-packed superlattice of passivated Ag nanocrystals

Authors

  • Steven A. Harfenist,

    1. School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430 (USA)
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  • Prof. Zhong L. Wang,

    Corresponding author
    1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245 (USA)
    • School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245 (USA)
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  • Prof. Robert L. Whetten,

    Corresponding author
    1. Schools of Physics, Chemistry and Biochemistry and Microelectronics Research Center, Georgia Institute of Technology, Atlanta, GA 30332-0430 (USA)
    • Schools of Physics, Chemistry and Biochemistry and Microelectronics Research Center, Georgia Institute of Technology, Atlanta, GA 30332-0430 (USA)
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  • Igor Vezmar,

    1. School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430 (USA)
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  • Dr. Marcos M. Alvarez

    1. School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430 (USA)
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  • We are grateful to Dr. J. Bradley for kindly providing help in using the JEOL 1200 TEM to perform the tilting experiment.

Abstract

Superlattices of self-assembled Ag nanocrystals have been prepared and the structure analyzed using a combination of techniques. It is shown that the supercrystals are hexagonally close-packed, attributed to a high proportion of icosahedral and decahedral particles. The Figure (a TEM image of the Ag supercrystals) illustrates that the crystals formed are predominantly triangular in morphology and can be as large as 3–5 μm.

original image

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