Fernando Molina - Academia.edu (original) (raw)

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Papers by Fernando Molina

Research paper thumbnail of Estudio de la adsorción de aniones sobre electrodos metálicos sólidos

Http Digital Bl Fcen Uba Ar, 1985

Research paper thumbnail of Simulación numérica del transporte iónico en electrodeposición en condiciones más realistas

Metodos Numericos Para Calculo Y Diseno En Ingenieria Revista Internacional, 2003

Research paper thumbnail of Lead pollution from waterfowl hunting in wetlands and rice fields in Argentina

Science of The Total Environment, 2016

Research paper thumbnail of Stable and unstable physicochemical hydrodynamic flows in thin-layer cell electrodeposition

Research paper thumbnail of Numerical simulation of ion transport in electrodeposition under more realistic conditions

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería

Research paper thumbnail of A semiempirical approach to the metal/inner layer capacity in the absence of specific adsorption

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1988

Research paper thumbnail of A semiempirical approach to the metal/inner layer capacity in the absence of specific adsorption

Research paper thumbnail of Three-dimensional nature of ion transport in thin-layer electrodeposition

Research paper thumbnail of Front Tracking in Thin-Layer Electrodeposition

Journal of the Physical Society of Japan, 2000

We present an experimental and theoretical study of front interaction duringthe growth of pattern... more We present an experimental and theoretical study of front interaction duringthe growth of patterns in thin-layer electrochemical deposition.Simultaneous schlieren and particle image velocimetry techniques are used tofollow front development of concentration fields and convection rolls ingravitoconvection prevailing flows. A theoretical model describing fullfront nonlinear interaction taking into account diffusive, migratory andconvective motion of ions in a viscous fluid subject to

Research paper thumbnail of Numerical and experimental studies of Electrochemical Deposition quasi-stable growth

Journal of Electroanalytical Chemistry, 2011

Research paper thumbnail of Fluorescence of polyaniline films on electrode surfaces: Thickness dependence and surface influence

Journal of Electroanalytical Chemistry, 2009

The dependence of the photoluminescence of polyaniline films, supported onto platinum or fluorine... more The dependence of the photoluminescence of polyaniline films, supported onto platinum or fluorine-doped SnO2 (FTO) electrodes, on the film thickness (as measured by the voltammetric charge) has been studied for different polymer oxidation states. The fluorescence emission spectra have been corrected for absorption and reflection from the underlying metal surface. For platinum electrodes, the absolute quantum yield for films of

Research paper thumbnail of Ion transport and deposit growth in spatially coupled bipolar electrochemistry

Journal of Electroanalytical Chemistry, 1999

Research paper thumbnail of Swelling and volume changes of polyaniline upon redox switching

Journal of Electroanalytical Chemistry, 2004

Research paper thumbnail of Adhesion of Colloidal Hematite onto Mercury in Water–Ethanol Media

Journal of Colloid and Interface Science, 1999

Research paper thumbnail of Adhesion of Hematite Particles onto Silver and Mercury Electrodes: Time Response to Potential Changes

Journal of Colloid and Interface Science, 1995

Research paper thumbnail of Drift Study of Hematite Adhered onto Silver and Mercury

Journal of Colloid and Interface Science, 1995

Research paper thumbnail of Application of a constrained regularization method to extraction of affinity distributions: Proton and metal binding to humic substances

Journal of Colloid and Interface Science, 2009

Research paper thumbnail of Potential and film thickness dependence of the photoluminescence of aryl amine polymers

Electrochimica Acta, 2004

ABSTRACT The fluorescence of polyaniline (PANI) and poly(2-methoxyaniline) (PMOA) films has been ... more ABSTRACT The fluorescence of polyaniline (PANI) and poly(2-methoxyaniline) (PMOA) films has been studied as a function of potential and film thickness. The fluorescence measurements were conducted on polymer films of different thicknesses on platinum electrodes. Absorption spectra were also recorded, using PANI films on semitransparent gold electrodes. The fluorescence emission intensity, in the reduced state as a function of polymer film thickness (measured through the voltammetric charge) shows a complex behaviour. For low thicknesses, none or minimum emission is observed; this is attributed to the metallic quenching of the fluorescence. Beyond a critical thickness, the emission increases sharply, then reaches a maximum and finally decays slightly towards a limiting value. The decay is interpreted as due to the attenuation of the waves reflected on the metal surface: both the excitation wave absorbed after being reflected, and the emitted one reaching the detector after reflection are exponentially attenuated as the film thickness increases. In the case of PMOA, a polymer that, depending on the synthesis conditions, shows either conducting or non-conducting (redox) behaviour, the conducting form has a fluorescence response similar to that of PANI, whereas the non-conducting form shows low emission.

Research paper thumbnail of Dense branched morphology in electrochemical deposition in a thin cell vertically oriented

Electrochimica Acta, 2007

... b) cell in the horizontal position (the plane of the growth is normal to gravity), 0.1 M ... ... more ... b) cell in the horizontal position (the plane of the growth is normal to gravity), 0.1 M ... time scaling, but it was limited because of the need for neglecting convective effects in cells in ... The cell consists of a thin layer of unsupported electrolyte confined between two parallel glass plates ...

Research paper thumbnail of Adhesion of hematite particles onto silver and mercury electrodes: time response to potential changes

Journal of colloid and …, 1995

The adherence of colloidal hematite onto silver and mercury electrodes is studied employing diffe... more The adherence of colloidal hematite onto silver and mercury electrodes is studied employing different deposition and electrochemical potential perturbation techniques. The time response of the attachment process is much shorter than that for particle transfer to a ...

Research paper thumbnail of Estudio de la adsorción de aniones sobre electrodos metálicos sólidos

Http Digital Bl Fcen Uba Ar, 1985

Research paper thumbnail of Simulación numérica del transporte iónico en electrodeposición en condiciones más realistas

Metodos Numericos Para Calculo Y Diseno En Ingenieria Revista Internacional, 2003

Research paper thumbnail of Lead pollution from waterfowl hunting in wetlands and rice fields in Argentina

Science of The Total Environment, 2016

Research paper thumbnail of Stable and unstable physicochemical hydrodynamic flows in thin-layer cell electrodeposition

Research paper thumbnail of Numerical simulation of ion transport in electrodeposition under more realistic conditions

Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería

Research paper thumbnail of A semiempirical approach to the metal/inner layer capacity in the absence of specific adsorption

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1988

Research paper thumbnail of A semiempirical approach to the metal/inner layer capacity in the absence of specific adsorption

Research paper thumbnail of Three-dimensional nature of ion transport in thin-layer electrodeposition

Research paper thumbnail of Front Tracking in Thin-Layer Electrodeposition

Journal of the Physical Society of Japan, 2000

We present an experimental and theoretical study of front interaction duringthe growth of pattern... more We present an experimental and theoretical study of front interaction duringthe growth of patterns in thin-layer electrochemical deposition.Simultaneous schlieren and particle image velocimetry techniques are used tofollow front development of concentration fields and convection rolls ingravitoconvection prevailing flows. A theoretical model describing fullfront nonlinear interaction taking into account diffusive, migratory andconvective motion of ions in a viscous fluid subject to

Research paper thumbnail of Numerical and experimental studies of Electrochemical Deposition quasi-stable growth

Journal of Electroanalytical Chemistry, 2011

Research paper thumbnail of Fluorescence of polyaniline films on electrode surfaces: Thickness dependence and surface influence

Journal of Electroanalytical Chemistry, 2009

The dependence of the photoluminescence of polyaniline films, supported onto platinum or fluorine... more The dependence of the photoluminescence of polyaniline films, supported onto platinum or fluorine-doped SnO2 (FTO) electrodes, on the film thickness (as measured by the voltammetric charge) has been studied for different polymer oxidation states. The fluorescence emission spectra have been corrected for absorption and reflection from the underlying metal surface. For platinum electrodes, the absolute quantum yield for films of

Research paper thumbnail of Ion transport and deposit growth in spatially coupled bipolar electrochemistry

Journal of Electroanalytical Chemistry, 1999

Research paper thumbnail of Swelling and volume changes of polyaniline upon redox switching

Journal of Electroanalytical Chemistry, 2004

Research paper thumbnail of Adhesion of Colloidal Hematite onto Mercury in Water–Ethanol Media

Journal of Colloid and Interface Science, 1999

Research paper thumbnail of Adhesion of Hematite Particles onto Silver and Mercury Electrodes: Time Response to Potential Changes

Journal of Colloid and Interface Science, 1995

Research paper thumbnail of Drift Study of Hematite Adhered onto Silver and Mercury

Journal of Colloid and Interface Science, 1995

Research paper thumbnail of Application of a constrained regularization method to extraction of affinity distributions: Proton and metal binding to humic substances

Journal of Colloid and Interface Science, 2009

Research paper thumbnail of Potential and film thickness dependence of the photoluminescence of aryl amine polymers

Electrochimica Acta, 2004

ABSTRACT The fluorescence of polyaniline (PANI) and poly(2-methoxyaniline) (PMOA) films has been ... more ABSTRACT The fluorescence of polyaniline (PANI) and poly(2-methoxyaniline) (PMOA) films has been studied as a function of potential and film thickness. The fluorescence measurements were conducted on polymer films of different thicknesses on platinum electrodes. Absorption spectra were also recorded, using PANI films on semitransparent gold electrodes. The fluorescence emission intensity, in the reduced state as a function of polymer film thickness (measured through the voltammetric charge) shows a complex behaviour. For low thicknesses, none or minimum emission is observed; this is attributed to the metallic quenching of the fluorescence. Beyond a critical thickness, the emission increases sharply, then reaches a maximum and finally decays slightly towards a limiting value. The decay is interpreted as due to the attenuation of the waves reflected on the metal surface: both the excitation wave absorbed after being reflected, and the emitted one reaching the detector after reflection are exponentially attenuated as the film thickness increases. In the case of PMOA, a polymer that, depending on the synthesis conditions, shows either conducting or non-conducting (redox) behaviour, the conducting form has a fluorescence response similar to that of PANI, whereas the non-conducting form shows low emission.

Research paper thumbnail of Dense branched morphology in electrochemical deposition in a thin cell vertically oriented

Electrochimica Acta, 2007

... b) cell in the horizontal position (the plane of the growth is normal to gravity), 0.1 M ... ... more ... b) cell in the horizontal position (the plane of the growth is normal to gravity), 0.1 M ... time scaling, but it was limited because of the need for neglecting convective effects in cells in ... The cell consists of a thin layer of unsupported electrolyte confined between two parallel glass plates ...

Research paper thumbnail of Adhesion of hematite particles onto silver and mercury electrodes: time response to potential changes

Journal of colloid and …, 1995

The adherence of colloidal hematite onto silver and mercury electrodes is studied employing diffe... more The adherence of colloidal hematite onto silver and mercury electrodes is studied employing different deposition and electrochemical potential perturbation techniques. The time response of the attachment process is much shorter than that for particle transfer to a ...