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Valencia Ramirez A, Bonneux G, Terfort A, Losada-Pérez P, Renner FU. Nanomechanical Stability of Laterally Heterogeneous Films of Corrosion Inhibitor Molecules Obtained by Microcontact Printing on Au Model Substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15614-15621. [PMID: 36484233 DOI: 10.1021/acs.langmuir.2c02276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Self-assembled monolayers of corrosion inhibitors of the mercaptobenzimidazole family, SH-BimH, SH-BimH-5NH2, and SH-BimH-5OMe, were formed on template-stripped ultraflat Au surfaces using microcontact printing, and subsequently analyzed using X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and AFM-force spectroscopy (AFM-FS) using a quantitative imaging (QI) mode. Printing of all used inhibitor molecules resulted in clear patterns and in slightly more compact films compared to immersion. The stability of the monolayers is further probed by AFM-FS. Adhesion values of laterally heterogeneous inhibitor-modified surfaces compared to bare Au surfaces, nonpatterned areas, and fully covered surfaces are analyzed and discussed. Microcontact printing confers a superior nanomechanical stability to imidazole-modified films of the printed surface patches as compared to homogeneously covered surfaces by immersion into the inhibitor solution.
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Affiliation(s)
- Andrea Valencia Ramirez
- Institute for Materials Research, Hasselt University, Diepenbeek 3590, Belgium
- Division IMOMEC, IMEC vzw, Diepenbeek 3590, Belgium
| | - Gilles Bonneux
- Institute for Materials Research, Hasselt University, Diepenbeek 3590, Belgium
- Division IMOMEC, IMEC vzw, Diepenbeek 3590, Belgium
| | - Andreas Terfort
- Institute of Inorganic and Analytical Chemistry, Goethe-University, Frankfurt am Main 60438, Germany
| | - Patricia Losada-Pérez
- Experimental Soft Matter and Thermal Physics Laboratory, Université Libre de Bruxelles (ULB), Brussels 1050, Belgium
| | - Frank Uwe Renner
- Institute for Materials Research, Hasselt University, Diepenbeek 3590, Belgium
- Division IMOMEC, IMEC vzw, Diepenbeek 3590, Belgium
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Surface Protection of Quaternary Gold Alloys by Thiol Self-Assembled Monolayers. Int J Mol Sci 2022; 23:ijms232214132. [PMID: 36430610 PMCID: PMC9697166 DOI: 10.3390/ijms232214132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/11/2022] [Accepted: 11/13/2022] [Indexed: 11/18/2022] Open
Abstract
This work deals with a physical and chemical surface characterization of quaternary 18K, 14K, and 9K gold alloys and pure polycrystalline gold substrates. Surface microstructure and composition are evaluated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray fluorescence spectroscopy. Corrosion resistance of 18K gold alloys is explored by potentiodynamic polarization showing the influence of the manufacturing process on materials fabricated as plates and wires. The research is also in the framework of one of the most common strategies on the modification of metallic surface properties, i.e., the building of self-assembled monolayers (SAM) from organic thiols. The metal affinity of the head group to produce the coating of the substrate by covalent binding is approached by using thiol compounds with different molecular structures and functional group chemistries exposed to an electrolyte solution. Therefore, a comparative study on the surface protection of a quaternary 18K gold alloy and pure gold substrates by SAMs of 6-mercaptopurine (6MP), 1-decanethiol (DT), and 11-mercaptoundecanoic acid (MUA) has been carried out. Surface modification and SAM organization are followed by cyclic voltammetry (CV), and the behavior of the double layer of the electrode-electrolyte interface is evaluated by electrochemical impedance spectroscopy (EIS). The study of these materials allows us to extract fundamental knowledge for its potential application in improving the bioactive properties of different jewelry pieces based on 18K gold alloys.
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Neupane S, Losada-Pérez P, Vivegnis S, Mekhalif Z, Delhalle J, Bashir A, Renner FU. Two-Step Nanoscale Approach for Well-Defined Complex Alkanethiol Films on Au Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:66-72. [PMID: 29221371 DOI: 10.1021/acs.langmuir.7b02760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Controlling the molecular organization of organic self-assembled monolayers (SAM) is of utmost importance in nanotechnology, molecular electronics, and surface science. Here we propose two well-differentiated approaches, double printing based on microcontact printing (μ-cp) and molecular backfilling adsorption, to produce complex alkanethiol films. The resulting films on model Au surfaces were characterized by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. Double printing alkanethiols results in clear coexisting regions where no molecular displacement is observed, highlighting the slow diffusion rates of long alkanethiols and large attractive interaction between long alkyl chains. Exposing a single-print μ-cp Au substrate to an additional alkanethiol solution yields the formation of differently ordered domain boundaries with different thickness and micrometer lateral size. The high order is a result of enhanced molecular mobility and restructuring during solution backfilling. The formed molecular assemblies constitute an excellent testing ground for nanoscale phenomena that strongly depend on the nanoscale geometrical and chemical features of the surface such as designed functionality or corrosion initiation and inhibition.
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Affiliation(s)
- S Neupane
- Institute for Materials Research (IMO), Hasselt University , 3590 Diepenbeek, Belgium
- IMEC vzw. Division IMOMEC, 3590 Diepenbeek, Belgium
| | - P Losada-Pérez
- Institute for Materials Research (IMO), Hasselt University , 3590 Diepenbeek, Belgium
- IMEC vzw. Division IMOMEC, 3590 Diepenbeek, Belgium
| | - S Vivegnis
- Institute for Materials Research (IMO), Hasselt University , 3590 Diepenbeek, Belgium
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES), University of Namur , 61, rue de Bruxelles, B-5000 Namur, Belgium
| | - Z Mekhalif
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES), University of Namur , 61, rue de Bruxelles, B-5000 Namur, Belgium
| | - J Delhalle
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES), University of Namur , 61, rue de Bruxelles, B-5000 Namur, Belgium
| | - A Bashir
- Thyssenkrupp Bilstein GmbH, Niederkell 25, 54429 Mandern, Germany
| | - F U Renner
- Institute for Materials Research (IMO), Hasselt University , 3590 Diepenbeek, Belgium
- IMEC vzw. Division IMOMEC, 3590 Diepenbeek, Belgium
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Yang W, Li T, Zhou H, Huang Z, Fu C, Chen L, Li M, Kuang Y. Electrochemical and anti-corrosion properties of octadecanethiol and benzotriazole binary self-assembled monolayers on copper. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.10.123] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chauvin A, Delacôte C, Molina-Luna L, Duerrschnabel M, Boujtita M, Thiry D, Du K, Ding J, Choi CH, Tessier PY, El Mel AA. Planar Arrays of Nanoporous Gold Nanowires: When Electrochemical Dealloying Meets Nanopatterning. ACS APPLIED MATERIALS & INTERFACES 2016; 8:6611-6620. [PMID: 26926232 DOI: 10.1021/acsami.5b11244] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanoporous materials are of great interest for various technological applications including sensors based on surface-enhanced Raman scattering, catalysis, and biotechnology. Currently, tremendous efforts are dedicated to the development of porous one-dimensional materials to improve the properties of such class of materials. The main drawback of the synthesis approaches reported so far includes (i) the short length of the porous nanowires, which cannot reach the macroscopic scale, and (ii) the poor organization of the nanostructures obtained by the end of the synthesis process. In this work, we report for the first time on a two-step approach allowing creating highly ordered porous gold nanowire arrays with a length up to a few centimeters. This two-step approach consists of the growth of gold/copper alloy nanowires by magnetron cosputtering on a nanograted silicon substrate, serving as a physical template, followed by a selective dissolution of copper by an electrochemical anodic process in diluted sulfuric acid. We demonstrate that the pore size of the nanowires can be tailored between 6 and 21 nm by tuning the dealloying voltage between 0.2 and 0.4 V and the dealloying time within the range of 150-600 s. We further show that the initial gold content (11 to 26 atom %) and the diameter of the gold/copper alloy nanowires (135 to 250 nm) are two important parameters that must carefully be selected to precisely control the porosity of the material.
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Affiliation(s)
- Adrien Chauvin
- Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
| | - Cyril Delacôte
- CEISAM, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
| | - Leopoldo Molina-Luna
- Department of Material- and Geosciences, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Michael Duerrschnabel
- Department of Material- and Geosciences, Technische Universität Darmstadt , Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Mohammed Boujtita
- CEISAM, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
| | - Damien Thiry
- Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
| | - Ke Du
- Department of Mechanical Engineering, Stevens Institute of Technology , Hoboken, New Jersey 07030, United States
| | - Junjun Ding
- Department of Mechanical Engineering, Stevens Institute of Technology , Hoboken, New Jersey 07030, United States
| | - Chang-Hwan Choi
- Department of Mechanical Engineering, Stevens Institute of Technology , Hoboken, New Jersey 07030, United States
| | - Pierre-Yves Tessier
- Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
| | - Abdel-Aziz El Mel
- Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS , 2 rue de la Houssinière B.P. 32229, 44322 Nantes cedex 3, France
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Scully JR. Corrosion chemistry closing comments: opportunities in corrosion science facilitated by operando experimental characterization combined with multi-scale computational modelling. Faraday Discuss 2015; 180:577-93. [PMID: 26114392 DOI: 10.1039/c5fd00075k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent advances in characterization tools, computational capabilities, and theories have created opportunities for advancement in understanding of solid–fluid interfaces at the nanoscale in corroding metallic systems. The Faraday Discussion on Corrosion Chemistry in 2015 highlighted some of the current needs, gaps and opportunities in corrosion science. Themes were organized into several hierarchical categories that provide an organizational framework for corrosion. Opportunities to develop fundamental physical and chemical data which will enable further progress in thermodynamic and kinetic modelling of corrosion were discussed. These will enable new and better understanding of unit processes that govern corrosion at the nanoscale. Additional topics discussed included scales, films and oxides, fluid–surface and molecular–surface interactions, selected topics in corrosion science and engineering as well as corrosion control. Corrosion science and engineering topics included complex alloy dissolution, local corrosion, and modelling of specific corrosion processes that are made up of collections of temporally and spatially varying unit processes such as oxidation, ion transport, and competitive adsorption. Corrosion control and mitigation topics covered some new insights on coatings and inhibitors. Further advances inoperandoorin situexperimental characterization strategies at the nanoscale combined with computational modelling will enhance progress in the field, especially if coupling across length and time scales can be achieved incorporating the various phenomena encountered in corrosion. Readers are encouraged to not only to use thisad hocorganizational scheme to guide their immersion into the current opportunities in corrosion chemistry, but also to find value in the information presented in their own ways.
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Affiliation(s)
- John R. Scully
- Center for Electrochemical Science and Engineering
- Department of Materials Science and Engineering
- SEAS
- University of Virginia
- Charlottesville
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