Fluorescent Gold Nanoparticle Superlattices

Authors

  • Naoki Nishida,

    1. Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun Hyogo 678-1297 (Japan)
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  • Edakkattuparambil S. Shibu,

    1. DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras Chennai 600 036 (India)
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  • Hiroshi Yao,

    1. Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun Hyogo 678-1297 (Japan)
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  • Tsugao Oonishi,

    1. Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun Hyogo 678-1297 (Japan)
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  • Keisaku Kimura,

    Corresponding author
    1. Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun Hyogo 678-1297 (Japan)
    • Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun Hyogo 678-1297 (Japan).
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  • Thalappil Pradeep

    Corresponding author
    1. DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras Chennai 600 036 (India)
    • DST Unit on Nanoscience (DST UNS), Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras Chennai 600 036 (India).
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  • Dedicated to Professor C. N. R. Rao on the occasion of his 75th Birthday.

  • The authors thank the Japan Society for the Promotion of Science and the Department of Science and Technology (DST), Government of India, for funding. The equipment support was provided by the Nanoscience and Nanotechnology initiative of the DST. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

original image

3D superlattices of fluorescent gold nanoparticles are prepared at an air/water interface. The hexagonal assembly extends over several micrometers, and crystals of triangular morphology are imaged using the fluorescence emission of the monolayers protecting the nanoparticles (see figure). Surprisingly, the superlattices are fluorescent even though the fluorescein derivative is close to the metallic core and strong quenching is expected.

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