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Entrapment of dye molecules within submicron silver particles

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Abstract

We describe a method for the preparation of metal–organic composites submicron particles. Specifically, the preparation of silver particle-clusters 150–200 nm in size, doped with an organic dye Congo-red, is reported. The use of sodium citrate coupled with sodium hypophosphite facilitated the formation of these particle-clusters, which were fully characterized by TEM analysis, Zeta potential and size measurements, scanning electron microscopy, UV–Vis measurements, and thermogravimetric analysis. The latter reveals a catalytic action of the metal on the thermal oxidative decomposition of the entrapped dye. The use of these particles to obtain dense thin metallic films was demonstrated by the coating of ITO glass.

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Acknowledgments

Support of the Ministry of Science and Technology through the infrastructure Tahtiot program and through an Eshkol scholarship (to I. Y.) is gratefully acknowledged. We thank Dr. Haviv Grisaru and the staff at the Center of Nanoscience and Nanotechnology at the Hebrew University for their support.

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Authors and Affiliations

  1. Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel

    Itzik Yosef & David Avnir

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  1. Itzik Yosef
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  2. David Avnir
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Correspondence to David Avnir.

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Yosef, I., Avnir, D. Entrapment of dye molecules within submicron silver particles. J Nanopart Res 13, 3929–3937 (2011). https://doi.org/10.1007/s11051-011-0315-1

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  • DOI: https://doi.org/10.1007/s11051-011-0315-1

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