Deposition of Ag and Ag-Au Nanocrystalline Films With Tunable Conductivity At The Water-Toluene Interface

Gemma Stansfield, Helena Johnston, Sean Baxter, John Thomas Prabhakar

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    Abstract

    Thin films of Au, Ag and Ag-Au alloy nanocrystals extending to areas of several square centimetres are obtained by deposition at the interface of water and toluene. Toluene containing chlorotris(triphenylphosphine)silver(I) and/or chlorotriphenylphosphine gold (I) is reacted with aqueous tetrakishhydroxymethlyphosphonium chloride to obtain nanocrystalline films adhered to the interfacial region. Alloying was induced by varying the composition of the toluene layer. The composition change results in regular and reproducible variation in the transport characteristics of the films, with the initially metallic deposits turning non-metallic with increased Au content. The
    films at the interface were transferred to different substrates and characterized using Atomic force microscopy, UV-visible spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Scanning and Transmission Electron microscopy.
    Original languageEnglish
    Pages (from-to)6225-6230
    JournalRSC Advances
    Volume8
    Early online date7 Feb 2018
    DOIs
    Publication statusPublished - 2018

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