Etude de l'interface de l'or polycristallin au contact de solutions aqueuses de perchlorate de potassium et d'acide perchlorique

Clavilier, J.; Huong, C. Nguyen Van

doi:10.1016/s0022-0728(77)80106-x

Cited by 134 publications

(52 citation statements)

References 16 publications

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“…experimentally for Au in 1 mM NaF. [51] Figure 2 shows that E m for the tubule-containing membrane does, indeed, go from the ideal cation permselective value, through zero, to the ideal anion permselective value, and that the potential at which E m approaches zero is close to the reported pzc. These data suggest that the nanotubule membranes might provide a new way to determine the pzc for an electrode/electrolyte interface.…”

Section: Experiments Where the Excess Charge Is Controlled Electrochementioning

confidence: 58%

Controlling Ion-Transport Selectivity in Gold Nanotubule Membranes

et al. 2001

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We have developed a new class of synthetic membranes that consist of a porous polymeric support. This support contains an ensemble of gold nanotubules that span the complete thickness of the support membrane. The support is a commercially available microporous polycarbonate filter with cylindrical nanoscopic pores. The gold nanotubules are prepared via electroless deposition of Au onto the pore walls, and tubules that have inside diameters of molecular dimensions (<1 nm) can be prepared. Hence, these membranes are a new class of molecular sieves. We review in this paper the ion‐transport properties of these Au nanotubule membranes. We will show that these membranes can be cation‐permselective or anion‐permselective, and that the permselectivity can be reversibly switched between these two states. Ion permselectivity can be introduced by two different routes. The first entails chemisorption of an ionizable thiol, e.g., a carboxylated or ammonium‐containing thiol to the Au tubule walls. If the thiol contains both of these functionalities (e.g., the amino acid cysteine), the permselectivity can be reversibly switched by varying the pH of the contacting solution phase. Ion permselectivity can also be introduced by potentiostatically charging the membrane in an electrolyte solution. By applying excess negative charge, cation permselective membranes are obtained, and excess positive charge yields anion permselective membranes. In this case the permselectivity can be reversibly switched by changing the potential applied to the membrane.

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Section: Experiments Where the Excess Charge Is Controlled Electrochementioning

confidence: 58%

Controlling Ion-Transport Selectivity in Gold Nanotubule Membranes

et al. 2001

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“…This procedure avoids structural changes on the gold electrode surface [47][48][49]. The modification process of the bare gold electrode was divided into three steps.…”

Section: Electrodesmentioning

confidence: 99%

New self-assembled layers composed with gold nanoparticles, cysteamine and dihydrolipoic acid deposited on bare gold template for highly sensitive and selective simultaneous sensing of dopamine in the presence of interfering ascorbic and uric acids

Łuczak

Osińska

2016

J Solid State Electrochem

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A gold bare template modified with self-assembled layers (SAMs) composed of gold nanoparticles and organic Scontaining compound: cysteamine and dihydrolipoic acid were prepared. The electrode with SAMs endowed with gold nanoparticles gave a high catalytic effect for dopamine electrooxidation alone and in the presence of biogenic interfering compounds: ascorbic acid and uric acid in solution at pH 7. For this novel sensor, a linear relationship between the current response of dopamine at the potential of peak maximum (j p ) and the concentration of this compound in solution (c DA ) was found over the range 0.1 μM to 0.85 mM with the detection limit of 0.023 μM.

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“…It was first observed decades ago in the study of aqueous solutions of NaI, NaF, KPF 6 ,a n dK B F 4 on Au or Ag electrodes, where specific adsorptions occur. (Clavilier & Huong, 1977;Grahame, 1947;Hamelin & Stoicoviciu, 1987;Valette, 1981) In aqueous electrolytes, the hump on the capacitance curves is typically a direct consequence of non-homogeneous polarization in the EDL. (MacDonald, 1954;MacDonald & Barlow Jr., 1962;Parsons, 1961) Arguably, the primary cause for such a capacitance curve in RTILs may be different.…”

Section: Edl Structure and Capacitance In Rtilsmentioning

confidence: 99%