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Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles

The increasing demand for raising the reliability of electronic contacts has led to the development of methods that protect metal surfaces against atmospheric corrosion agents. This severe problem implies an important economic cost annually but small amounts of corrosion inhibitors can control, decr...

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Autores principales: Rodríguez González, Miriam C., Luis-Sunga, Maximina, Souto, Ricardo M., Hernández Creus, Alberto, Pastor, Elena, García, Gonzalo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7830569/
https://www.ncbi.nlm.nih.gov/pubmed/33477446
http://dx.doi.org/10.3390/molecules26020471
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author Rodríguez González, Miriam C.
Luis-Sunga, Maximina
Souto, Ricardo M.
Hernández Creus, Alberto
Pastor, Elena
García, Gonzalo
author_facet Rodríguez González, Miriam C.
Luis-Sunga, Maximina
Souto, Ricardo M.
Hernández Creus, Alberto
Pastor, Elena
García, Gonzalo
author_sort Rodríguez González, Miriam C.
collection PubMed
description The increasing demand for raising the reliability of electronic contacts has led to the development of methods that protect metal surfaces against atmospheric corrosion agents. This severe problem implies an important economic cost annually but small amounts of corrosion inhibitors can control, decrease or avoid reactions between a metal and its environment. In this regard, surfactant inhibitors have displayed many advantages such as low price, easy fabrication, low toxicity and high inhibition efficiency. For this reason, in this article, the spectroelectrochemical behavior of polycrystalline gold electrode modified by reverse micelles (water/polyethyleneglycol-dodecylether (BRIJ 30)/n-heptane) is investigated by atomic force microscopy (AFM), potentiodynamic methods and electrochemical impedance spectroscopy (EIS). Main results indicate a strong adsorption of a monolayer of micelles on the gold substrate in which electron tunneling conduction is still possible. Therefore, this method of increasing the corrosion resistance of gold contacts is usable only in conditions of long-term storage but not in the operation of devices with such contacts. In this regard, the micelle coating must be removed from the surface of the gold contacts before use. Finally, the aim of the present work is to understand the reactions occurring at the surfactant/metal interface, which may help to improve the fabrication of novel electrodes.
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spelling pubmed-78305692021-01-26 Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles Rodríguez González, Miriam C. Luis-Sunga, Maximina Souto, Ricardo M. Hernández Creus, Alberto Pastor, Elena García, Gonzalo Molecules Article The increasing demand for raising the reliability of electronic contacts has led to the development of methods that protect metal surfaces against atmospheric corrosion agents. This severe problem implies an important economic cost annually but small amounts of corrosion inhibitors can control, decrease or avoid reactions between a metal and its environment. In this regard, surfactant inhibitors have displayed many advantages such as low price, easy fabrication, low toxicity and high inhibition efficiency. For this reason, in this article, the spectroelectrochemical behavior of polycrystalline gold electrode modified by reverse micelles (water/polyethyleneglycol-dodecylether (BRIJ 30)/n-heptane) is investigated by atomic force microscopy (AFM), potentiodynamic methods and electrochemical impedance spectroscopy (EIS). Main results indicate a strong adsorption of a monolayer of micelles on the gold substrate in which electron tunneling conduction is still possible. Therefore, this method of increasing the corrosion resistance of gold contacts is usable only in conditions of long-term storage but not in the operation of devices with such contacts. In this regard, the micelle coating must be removed from the surface of the gold contacts before use. Finally, the aim of the present work is to understand the reactions occurring at the surfactant/metal interface, which may help to improve the fabrication of novel electrodes. MDPI 2021-01-18 /pmc/articles/PMC7830569/ /pubmed/33477446 http://dx.doi.org/10.3390/molecules26020471 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodríguez González, Miriam C.
Luis-Sunga, Maximina
Souto, Ricardo M.
Hernández Creus, Alberto
Pastor, Elena
García, Gonzalo
Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title_full Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title_fullStr Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title_full_unstemmed Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title_short Spectroelectrochemical Behavior of Polycrystalline Gold Electrode Modified by Reverse Micelles
title_sort spectroelectrochemical behavior of polycrystalline gold electrode modified by reverse micelles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7830569/
https://www.ncbi.nlm.nih.gov/pubmed/33477446
http://dx.doi.org/10.3390/molecules26020471
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