Deposition of Ag and Ag–Au nanocrystalline films with tunable conductivity at the water–toluene interface

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.

Liquid–liquid interfaces: a unique and advantageous environment to prepare and process thin films of complex materials

“…Interestingly, the film resistance scales up exponentially with the Ag/Au ratio, changing from metallic to non-metallic behavior when the amount of Ag-NPs falls below 70%. 79 Ultra-large films of single-crystal Ag-NPs were also described by Yao et al via a chloroform/water interfacial reaction between an aqueous solution of AgNO 3 as a precursor and chloroform solution of o-ethoxyaniline (OEA) as a reductant. 80 The influence of the experimental parameters such as the reagent concentrations, temperature and organic phase used to produce the L/L interface on the film morphology was demonstrated, as well as the SERS activity of the films deposited over silicon wafers.…”

“…78 The water/ toluene interface was also the system used to produce thin films of Au-NPs, Ag-NPs and Ag-Au alloy-NPs with different Au/Ag ratios, extending to areas of several square centimeters, based on the reaction of chlorotris(triphenylphosphine)silver(I) and/or chlorotriphenylphosphine gold(I) in toluene with tetrakishydroxymethylphosphonium chloride in aqueous solution. 79 The transport properties of the films were studied and indicated the presence of continuous films arising from the connection between the individual nanoparticles. Interestingly, the film resistance scales up exponentially with the Ag/Au ratio, changing from metallic to non-metallic behavior when the amount of Ag-NPs falls below 70%.…”

Gold, Silver, and Electrum Electroless Plating on Additively Manufactured Laser Powder-Bed Fusion AlSi10Mg Parts: A Review

“…In addition, industrial processes commonly use environmentally hazardous materials such as cyanide compounds [42,43]. A few studies have been published on the electrochemical deposition of Au-Ag alloy films [44][45][46][47]. However, no formulations of ELD for Au-Ag alloy coatings have been published in the open literature before Inberg et al 2020 [48].…”