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Blue Luminescence of Dendrimer-Encapsulated Gold Nanoclusters

Authors

  • Jun Myung Kim,

    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
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    • These authors contributed equally to this work.

  • So Hyeong Sohn,

    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
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    • These authors contributed equally to this work.

  • Noh Soo Han,

    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
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  • Prof. Seung Min Park,

    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
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  • Prof. Joohoon Kim,

    Corresponding author
    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
    • Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)

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  • Prof. Jae Kyu Song

    Corresponding author
    1. Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)
    • Department of Chemistry, Research Institute for Basic Sciences, Kyung Hee University, Seoul 130-701 (Korea)

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Abstract

Direct evidence for the blue luminescence of gold nanoclusters encapsulated inside hydroxyl-terminated polyamidoamine (PAMAM) dendrimers was provided by spectroscopic studies as well as by theoretical calculations. Steady-state and time-resolved spectroscopic studies showed that the luminescence of the gold nanoclusters consisted largely of two electronic transitions. Theoretical calculations indicate that the two transitions are attributed to the different sizes of the gold nanoclusters (Au8 and Au13). The luminescence of the gold nanoclusters was clearly distinguished from that of the dendrimers.

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