Three-Dimensionally Ordered Gold Nanocrystal/Silica Superlattice Thin Films Synthesized via Sol–Gel Self-Assembly

Authors

  • H. Fan,

    1. Chemical Synthesis and Nanomaterials Department, Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Albuquerque, NM 87106, USA
    2. NSF Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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  • A. Wright,

    1. NSF Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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  • J. Gabaldon,

    1. NSF Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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  • A. Rodriguez,

    1. NSF Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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  • C. J. Brinker,

    1. Chemical Synthesis and Nanomaterials Department, Advanced Materials Laboratory, Sandia National Laboratories, 1001 University Blvd. SE, Albuquerque, NM 87106, USA
    2. NSF Center for Micro-Engineered Materials, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131, USA
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  • Y.-B. Jiang

    1. Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, USA
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  • This work was partially supported by the U.S. Department of Energy (DOE) Basic Energy Sciences Program, Sandia National Laboratory's Laboratory Directed R&D program, the Air Force Office of Scientific Research, and Center for Integrated Nanotechnologies (CINT). We acknowledge use of the SEM facility at University of New Mexico supported by the NSF EPSCOR and NNIN grants. TEM investigations were performed in the Department of Earth and Planetary Sciences at the University of New Mexico. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000.

Abstract

Nanocrystals and their ordered arrays hold many important applications in fields such as catalysis, surface-enhanced Raman spectroscopy based sensors, memory storage, and electronic and optical nanodevices. Herein, a simple and general method to synthesize ordered, three-dimensional, transparent gold nanocrystal/silica superlattice thin films by self-assembly of gold nanocrystal micelles with silica or organosilsesquioxane by spin-coating is reported. The self-assembly process is conducted under acidic sol–gel conditions (ca. pH 2), ensuring spin-solution homogeneity and stability and facilitating the formation of ordered and transparent gold nanocrystal/silica films. The monodisperse nanocrystals are organized within inorganic host matrices as a face-centered cubic mesostructure, and characterized by transmission electron spectroscopy and X-ray diffraction.

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