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Fernando Cortes Salazar

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Related publications (46)

Finger Probe Array for Topography-Tolerant Scanning Electrochemical Microscopy of Extended Samples

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

Scanning electrochemical microscopy with soft microelectrode array probes has recently been used to enable reactivity imaging of extended areas and to compensate sample corrugation perpendicular to the scanning direction. Here, the use of a new type of mic ...

Amer Chemical Soc2014

Rapid optimisation of a lactate biosensor design using soft probes scanning electrochemical microscopy

Hubert Girault, Fernando Cortes Salazar, Andreas Stephan Lesch

We report the mapping of biocatalytically active surfaces, particularly on an express search for optimal immobilization conditions of the enzyme lactate oxidase by means of scanning electrochemical microscopy (SECM). With this aim, soft stylus SECM probes ...

Elsevier2014

Proteins/peptides purification by a three-well OFFGEL electrophoresis with immobilized ultra narrow pH gradient gels

Hubert Girault, Fernando Cortes Salazar, Liang Qiao, Elena Tobolkina

Purification and desalting of protein and peptide samples by a three-well OFFGEL electrophoresis with immobilized ultra narrow pH gradient gels is proposed as a fast preparative strategy for proteomics. The gist of this strategy is to separate the proteins ...

Royal Society of Chemistry2014

Large scale inkjet-printing of carbon nanotubes electrodes for antioxidant assays in blood bags

Hubert Girault, Michel Prudent, Niels Erik Lion, Fernando Cortes Salazar, Andreas Stephan Lesch

Herein, we present the large scale fabrication of carbon nanotubes (CNT) electrodes supported on flexible polymeric sheets by subsequent multilayer inkjet printing of a silver layer for electrical connection, CNT layers as active electrode material and an ...

Elsevier2014

Electrochemical As(III) Whole-Cell Based Biochip Sensor

Hubert Girault, Fernando Cortes Salazar

The development of a whole-cell based sensor for arsenite detection coupling biological engineering and electrochemical techniques is presented. This strategy takes advantage of the natural Escherichia coli resistance mechanism against toxic arsenic specie ...

Elsevier2013

Conductive Gold Nanoparticle Mirrors at Liquid/Liquid Interfaces

Hubert Girault, Frédéric Gumy, Carlos Manuel De Melo Pereira, Fernando Cortes Salazar, Véronique Amstutz, Dmitry Momotenko, Haiqiang Deng, Pingping Fang, Micheal Diarmaid Scanlon

Gold nanoparticle (Au NP) mirrors, that exhibit both high reflectance and electrical conductance, were self-assembled at a [heptane + 1,2-dichloroethane]/water liquid/liquid interface. The highest reflectance, as observed experimentally and confirmed by fi ...

Amer Chemical Soc2013

Parylene C Coated Microelectrodes For Scanning Electrochemical Microscopy

Hubert Girault, Carlos Manuel De Melo Pereira, Fernando Cortes Salazar, Haiqiang Deng, Pekka Eero Peljo

Herein, we present a simple microelectrode preparation methodology consisting in coating a platinum wire or a carbon fiber with a thin insulating Parylene C film (e.g. 1–10 μm), to produce SECM probes with a small and constant probe RG (i.e. ratio between ...

Elsevier2013

Electrochemical Pseudo-Titration of Water-Soluble Antioxidants

Hubert Girault, Alice Adei Neequaye, Fernando Cortes Salazar, Andreas Stephan Lesch

An amperometric test for the antioxidant power (AOP) of biological and food samples is presented. The gist of the method is to measure by linear sweep voltammetry the anodic current produced during the oxidation of the labile species present in the sample ...

Wiley-Blackwell2013

High-throughput scanning electrochemical microscopy brushing of strongly tilted and curved surfaces

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

The feasibility of high-throughput scanning electrochemical microscopy (SECM) of strongly tilted (tilt angles ≤4°) and curved substrates (diameter of curvature ≥9 cm) is demonstrated by brushing them with a soft linear array of carbon microelectrodes. This ...

Elsevier2013

Oxygen and hydrogen peroxide reduction by 1,2-diferrocenylethane at a liquid/liquid interface

Hubert Girault, Fernando Cortes Salazar, Peiyu Ge, Haiqiang Deng, Pekka Eero Peljo

Molecular oxygen and hydrogen peroxide reduction by 1,2-diferrocenylethane (DFcE) was investigated at a polarized water/1,2-dichloroethane (W/DCE) interface. The overall reaction points to a proton-coupled electron transfer (PCET) mechanism, where the firs ...

Elsevier2012

Electrochemical Push–Pull Scanner with Mass Spectrometry Detection

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Liang Qiao, Dmitry Momotenko, Andreas Stephan Lesch

This manuscript presents a push-pull electrochem. scanner able to image reactivity of initially dry surfaces by scanning electrochem. microscopy (SECM) and to probe mols. present or generated at the surface by mass spectrometry (MS). The proof-of-concept i ...

Amer Chemical Soc2012

Segmented Field OFFGEL® Electrophoresis

Hubert Girault, Julien Maillard, Fernando Cortes Salazar, Dmitry Momotenko, Elena Tobolkina

A multielectrode setup for protein OFFGEL electrophoresis that significantly improves protein separation efficiency has been developed. Here, the electric field is applied by segments between seven electrodes connected in series to six independent power su ...

Wiley-Blackwell2012

Microfluidic Push-Pull Probe for Scanning Electrochemical Microscopy

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

This paper presents a microfluidic push-pull probe for scanning electrochemical microscopy (SECM) consisting of a working microelectrode, an integrated counter/reference electrode and two microchannels for pushing and pulling an electrolyte solution to and ...

2011

Ion current rectification and rectification inversion in conical nanopores: a perm-selective view

Hubert Girault, Fernando Cortes Salazar, Dmitry Momotenko

Ionic transport in charged conical nanopores is known to give rise to ion current rectification. The present study shows that the rectification direction can be inverted when using electrolyte solutions at very low ionic strengths. To elucidate these pheno ...

Royal Society of Chemistry2011

Artificial Photosynthesis at Soft Interfaces

Hubert Girault, Patrick Voyame, Fernando Cortes Salazar, Manuel Alejandro Méndez Agudelo, Imren Hatay, Peiyu Ge, Astrid Johana Olaya Avendano, Haiqiang Deng, Zahra Nazemi

The concept of artificial photosynthesis at a polarised liquid membrane is presented. It includes two photosystems, one at each interface for the hydrogen and oxygen evolution respectively. Both reactions involve proton coupled electron transfer reactions, ...

Schweizerische Chemische Gesellschaft2011

Seeing Big with Scanning Electrochemical Microscopy

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

Specialized microelectrode probes fabricated in a soft polymer film now make it possible to use scanning electrochemical microscopy to image the reactivity of large, corrugated, tilted, and dry surfaces. ...

American Chemical Society2011

LEPA: From Proteomics to Energy Conversion

Hubert Girault, Anne-Laure Gassner, Fernando Cortes Salazar, Mohammad Reza Pourhaghighi, Manuel Alejandro Méndez Agudelo, Liang Qiao

This review article summarizes the different fields of research at the Laboratoire d'Electrochimie Physique et Analytique at the Ecole Polytechnique Federale de Lausanne. The research areas covered include charge transfer reactions at soft interfaces, bio- ...

2011

Soft Microelectrode Linear Array for Scanning Electrochemical Microscopy

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

A linear array of eight individual addressable microelectrodes has been developed in order to perform highthroughput scanning electrochemical microscopy (SECM) imaging of large sample areas in contact regime. Similar to previous reports, the soft microelec ...

American Chemical Society2010

Voltammetric determination of extreme standard Gibbs ion transfer energy

Hubert Girault, Fernando Cortes Salazar, Manuel Alejandro Méndez Agudelo, Astrid Johana Olaya Avendano

A voltammetric methodology to determine the standard Gibbs energy of transfer of highly hydrophobic and hydrophilic ions has been developed. The electrochemical cell used includes a water|1,2-dichloroethane micro-interface supported on a microhole in a thi ...

Elsevier2010

Fountain pen for scanning electrochemical microscopy

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

A fountain pen probe has been developed to extend the scope of scanning electrochemical microscopy (SECM) experiments to dry surfaces. The fountain pen is fabricated by UV-photoablation of a polyethylene terephthalate (PET) film and consists on one side of ...

Royal Society of Chemistry2010

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