Is gold always chemically passive?

Aufray, Maëlenn; Roche, A.

doi:10.1016/j.apsusc.2007.07.192

Cited by 25 publications

(17 citation statements)

References 32 publications

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“…This might modify the stabilityo ft he electrode after repeated emission cycles. [16] Gold materials were appliedf or the ECL of luminol in neutral or basic aqueous solution, [32] also in the form of gold nanorods/nanoparticles modifiede lectrodes. [33] In addition to flat electrode surfaces, porous gold electrodes [34] were used to enhance the ECL signal compared to flat gold electrode of CdTe quantun dots [35] or as scaffold for loading Ru(bpy) 3 2 + in as olid state ECL device.…”

Section: Noble Electrode Materials:platinum and Goldmentioning

confidence: 99%

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Essential Role of Electrode Materials in Electrochemiluminescence Applications

et al. 2016

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The phenomenon of electrochemiluminescence (ECL) is luminescence triggered by electrochemical reactions at electrodes. Heterogeneous electron transfers are deeply dependent on electrode materials, therefore, besides the usual parameters, the right choice of the electrode is a crucial point to address properly in order to maximize the emission efficiency. Many different electrodes have been studied, from metallic platinum or gold through transparent indium‐doped tin oxide to carbon‐based electrodes, and others, such as paper‐based and boron‐doped diamond. This review summarizes results of ECL at different electrode surfaces, disclosing the relative advantages and disadvantages, with a particular attention to the reference Ru(bpy)32+/TPrA coreactant system. In other words, we offer an insight to recognize and select the optimal electrode material for the ECL systems of interest with particular emphasis on the biosensing applications.

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Section: Noble Electrode Materials:platinum and Goldmentioning

confidence: 99%

“…Moreover,s urface modification by the adsorption of intermediates, such as radical cation or coreactant by-products,a re knownt op oison the electrode surface. [16] This effect might decrease the ECL intensity and modify the stabilityo ft he electrode after repeated emission cycles.…”

Section: Introductionmentioning

confidence: 99%

Essential Role of Electrode Materials in Electrochemiluminescence Applications

et al. 2016

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“…Thus, in epoxy resin, diamine monomers chemically react with hydrated metallic oxide layer. Metallic ions diffuse into the liquid resin to form organometallic complexes 5–14. This layer has mixed organic–inorganic nature and binds high surface energy inorganic substrate with low surface energy polymeric coating.…”

Section: Introductionmentioning

confidence: 99%

“…This layer modifies the glass transition temperature of the polymer, the degree of cross‐linking, the Young's modulus and internal residual stresses. Several works cover the mechanisms of adsorption of amines on different oxidized metal surfaces 5–14. In the case of ZnO, it was shown that surface centers Zn + react with the amine molecules following a Lewis acid/base mechanism; while the hydroxyl and the carbonate‐like species react following a Brönsted acid/base mechanism 11.…”

Section: Introductionmentioning

confidence: 99%

An SKP and EIS investigation of amine adsorption on zinc oxide surfaces

Назаров

Thierry

Volovitch

et al. 2010

Surface & Interface Analysis

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A metal/oxide/polymer 'interphase' with mixed organic-inorganic nature insures the high stability and the strength of the adhesive joints in a variety of corrosive environments. To model the interaction of epoxy resin with a metal surface, the interaction of amines of different structure with oxidized zinc surfaces was studied by Scanning Kelvin Probe (SKP), FTIR microscopy in atmospheric conditions, and a.c. and d.c. electrochemical techniques in the aqueous electrolyte. It was shown that bidentate ligand-ethylendiamine, forming stable chelate complexes reacts with zinc oxide with redeposition of the interphase. In air and water electrolyte, this ligand shifts the potential of Zn/ZnO electrode to the level of the oxide-free zinc. The amines with low chelating property show low effect on the potential of Zn/ZnO. The SKP was used to measure the potential drop at epoxy resin/zinc interface. On this basis, SKP is proposed as a sensitive nondestructive technique to characterize in situ the interaction of the resin with the metal and the subsequent formation of the interphase in the metal-polymer joints. Copyright

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“…Vacuum impregnation with a mixture of epoxy resin and amine hardener, followed by curing, yielded the composite samples. Chemisorption of the amine hardener on the gold surface24 implies good wetting and, hence, a tendency for spontaneous imbibition of the fluid by the nanoporous metal. According to the Washburn law, the time-scale for imbibition scales with the inverse square-root of the viscosity 25, 26.…”

mentioning

confidence: 99%