Articolele autorului Stelian Lupu
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In-Situ Combined Electrochemical Surface Plasmon Resonance Study Of Ultra-Thin Prussian Blue Films Deposited On Gold Electrodes

This paper reports on the characterisation of ultra-thin Prussian Blue films has been performed using in-situ combined Electrochemical Surface Plasmon Resonance technique. Prussian Blue films have been prepared, by potentiostatic method, on a gold-coated glass Surface Plasmon Resonance sensor. The electrochemical redox processes of Prussian Blue, i.e., the reduction of Prussian blue to Prussian White and the oxidation to Berlin Green, are accompanied

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Electrochemical detection of ascorbic acid and dopamine using poly-(3,4-ethylenedioxythiophene)/Prussian blue films on platinum

The electrochemical behaviour and analytical applications of bilayer films consisting of poly-[3,4-ethylenedioxythiophene] (PEDOT), and subsequently of iron (III)hexacyanoferrate, well known as Prussian Blue (PB), on a platinum electrode, are reported. The electrocatalytic activity of the PEDOT conducting polymer/Prussian Blue bilayer system towards the oxidation of ascorbic acid and dopamine is examined in aqueous solutions. From differential pulse

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A poly(3,4-ethylenedioxythiophene)-poly(styrene sulphonate) composite electrode coating in the electrooxidation of phenol

The effectiveness of using conducting polymers as electrode coating material in order to prevent electrode fouling caused by electrochemical oxidation of phenol is investigated. In particular, the use of poly(3,4-ethylenedioxythiophene) (PEDOT) has been tested. Electrode passivation is dramatically reduced while incorporating surfactants containing hydrophilic groups into the polymeric structure. A significant improvement in performance is obtained

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Differential pulse techniques on modified conventional-size and microelectrodes. Poly[4,4′-bis(butylsulfanyl)-2,2′-bithiophene] coating

Poly[4,4'-bis(butylsulfanyl)-2,2'-bithiophene] modified conventional-size and (ultra)microelectrodes are first investigated in acetonitrile and quasi-neutral aqueous solution with respect to the repeatability of the responses obtained both in cyclic voltammetry and in differential pulse voltammetry. The reactivity towards ferrocene and hydroquinone, chosen as benchmark oxidizable substances in the two media, respectively, is considered. Comparison

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Polythiophene derivative conducting polymer modified electrodes and microelectrodes for determination of ascorbic acid. Effect of possible interferents

Conventional-size electrodes and microelectrodes coated by electrogenerated poly[4,4'-bis(butylsulfanyl)-2,2'-bithiophene] have been tested with respect to the electrocatalytic oxidation of a particularly interesting analyte, i.e., ascorbic acid, in different concentrations of phosphate buffer, aqueous solution. Linear sweep and cyclic voltammetry have been used and the quantities related to the analyte concentration were the peak current and the

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Electrochemical preparation and characterisation of bilayer films composed by Prussian Blue and conducting polymer

Preparation and electrochemical behaviour of bilayer films consisting of iron(III) hexacyanoferrate, well known as Prussian Blue, and of poly [4,4'-bis(butylsulphanyl)-2,2'-bithiophene], on a platinum electrode, are reported. The electrochemical features of the Prussian Blue/conducting polymer bilayer system are examined in aqueous and acetonitrile solutions. Cyclic voltammetric studies show that, in acetonitrile solvent, the inner layer Prussian

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Study of Ultra-Thin Prussian Blue Films Using in Situ Electrochemical Surface Plasmon Resonance

Characterisation of ultrathin Prussian Blue films has been performed using in situ electrochemical surface plasmon resonance technique. Prussian Blue films have been prepared by potentiostatic method on a gold-coated glass surface plasmon resonance sensor. The electrochemical reduction of Prussian Blue to Prussian White and oxidation to Berlin Green are accompanied by a change of the refractive index; the system shows repeating voltammetric responses

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