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Dive into the research topics where Jorge O. Zerbino is active.

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Featured researches published by Jorge O. Zerbino.


Journal of Electroanalytical Chemistry | 2002

Electrochemical and optical study of rhenium layers formed on gold electrodes

Jorge O. Zerbino; A.M. Castro Luna; C.F. Zinola; Eduardo Méndez; M.E. Martins

Films obtained after cathodic polarization at Ec, −0.2 V≤Ec≤0.1 V (vs. RHE), in aqueous acid perrhenate have been investigated using cyclic voltammetry and ellipsometry. The thickness and optical indices corresponding to the electrodeposited rhenium layer were calculated. The results indicate the formation of a composite layer, with a volumetric fraction of about 30% of metallic rhenium and hydrogen occlusion.


Journal of the Brazilian Chemical Society | 2002

A comparative study of electrochemical and optical properties of rhenium deposited on gold and platinum

Jorge O. Zerbino; Ana M. Castro Luna; C.F. Zinola; Eduardo Méndez; M.E. Martins

Rhenium-containing films were grown on gold and platinum after different potentiostatic and potentiodynamic polarizations in the - 0.20 V to 0.70 V range (vs rhe) in aqueous acid perrhenate. Experimental data were obtained using cyclic voltammetry and ellipsometry, from which the thickness and optical indices of the electrodeposited rhenium layer were calculated. Metallic rhenium deposition on gold takes place at potentials within the hydrogen evolution reaction. Rhenium oxide on platinum is formed in the hydrogen adatom potential domain, whereas metallic rhenium is deposited concurrently with the hydrogen adsorption and evolution reactions on the same metal.


Journal of Colloid and Interface Science | 2003

CO adsorption on copper in alkaline electrolytes: an electrochemical and ellipsometric study.

R.M Torres Sánchez; A.M. Castro Luna; Jorge O. Zerbino

The influence of CO on the passive behavior of copper was analyzed in the potential region near the rest potential in borax solutions (pH 9.2) by cyclic voltammetry, ellipsometry, and surface charge determination techniques. The oxide formation is explained as a sequence of Cu(2)O growth, cation adsorption, Cu(II), and dissolution steps, similarly to previously reported investigations for the metal in free CO solutions. The CO adsorption hinders the cationic defect in the outer oxide layer and accelerates the Cu(2)O growth both at open circuit and in controlled potential experiments. The isoelectric point, iep, obtained at pH 10.8 for both the metal Cu and CuO particles in KCl solutions shifts to pH 10.1 for copper particles in the presence of CO. The iep indicates a CuO coating on Cu metallic particles in the absence of CO.


arXiv: Optics | 2017

Optical and electrical properties of nanostructured metallic electrical contacts

Víctor Toranzos; Guillermo P. Ortiz; W. Luis Mochan; Jorge O. Zerbino

We study the optical and electrical properties of silver films with a graded thickness obtained through metallic evaporation in vacuum on a tilted substrate to evaluate their use as semitransparent electrical contacts. We measure their ellipsometric coefficients, optical transmissions and electrical conductivity for different widths, and we employ an efficient recursive method to calculate their macroscopic dielectric function, their optical properties and their microscopic electric fields. The topology of very thin films corresponds to disconnected islands, while very wide films are simply connected. For intermediate widths the film becomes semicontinuous, multiply connected, and its microscopic electric field develops hotspots at optical resonances which appear near the percolation threshold of the conducting phase, yielding large ohmic losses that increase the absorptance above that of a corresponding homogeneous film. Optimizing the thickness of the film to maximize its transmittance above the percolation threshold of the conductive phase we obtained a film with transmittance T = 0.41 and a sheet resistance


International journal of electrochemistry | 2011

Electrochromism and Swelling of Polypyrrole Membranes: An Electrochemical and Ellipsometric Study

Jorge O. Zerbino; María G. Sustersic; Claudio Falivene; N. Avaca; Alberto Maltz

R_{\square}^{\mathrm{max}}\approx2.7\Omega


Portugaliae Electrochimica Acta | 2004

Cuprous Oxide Layers Grown on Copper. Effect of CO Adsorption

L.M. Gassa; A.M. Castro Luna; R.M Torres Sánchez; Jorge O. Zerbino

. We also analyze the observed emission frequency shift of porous silicon electroluminescent devices when Ag films are used as solid electrical contacts in replacement of electrolytic ones.


Acta Chimica Slovenica | 2009

Effect of Oxalate on The Growth of Cuprous Oxide Layers on Copper Electrodes. Ellipsometric and Isoelectric Point Study

Jorge O. Zerbino; Rosa M. Torres Sánchez; Marija G. Sustersic

The growth of polypyrrole (Ppy) layers on gold electrodes in nearly neutral pH solutions is analysed using “in situ” voltametric and ellipsometric techniques. Different film structures are obtained depending on the potentiodynamic programme and the composition of the electrolyte. More compact dodecylsulphate-(DS) doped Ppy layers were grown at 1.2 V versus RHE than those obtained by applying a higher potential. The more compact layers correspond to the growth of an oxidised Ppy/DS layer that shows low pseudo capacity behaviour. After dipping, the doped Ppy/DS film in KCl solution-significant variations in optical indices and thickness are detected as a function of the applied potential. Higher electrochromism as well as decrease in film thickness after cathodisation is achieved. The optical indices and the thickness of the Ppy layer formed under different applied potential/time programmes are estimated.


Avances en Ciencias e Ingeniería | 2010

Películas de polipirrol electropolimerizadas en presencia de dodecilsulfato de sodio

Jorge O. Zerbino; Claudio Falivene; Alberto Maltz; María G. Sustersic


Avances en Ciencias e Ingeniería | 2017

Efecto del ciclado de potencial y tiempo de almacenamiento en las propiedades ópticas y de conducción de films de poli-o-aminofenol y polipirrol

Ricardo I. Tucceri; Claudio Falivene; Jorge O. Zerbino


Archive | 2014

ESTUDIO ELIPSOMÉTRICO DE PELÍCULAS SEMITRANSPARENTES DE PLATA DEPOSITADAS SOBRE VIDRIO ELLIPSOMETRIC STUDY OF SEMITRANSPARENT SILVER LAYERS DEPOSITED ON GLASS

Víctor Toranzos; Jorge O. Zerbino; Alberto Maltz; Guillermo P. Ortiz

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A.M. Castro Luna

National University of La Plata

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C.F. Zinola

National University of La Plata

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M.E. Martins

National Scientific and Technical Research Council

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Guillermo P. Ortiz

National Autonomous University of Mexico

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Ana M. Castro Luna

National University of La Plata

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L.M. Gassa

National University of La Plata

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W. Luis Mochan

National Autonomous University of Mexico

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