Electrochemistry and structure of the isomers of aminothiophenol adsorbed on gold

Batz, Vered; Schneeweiss, Marie Anne; Kramer, Dominik; Hagenström, H.; Kolb, Dieter M.; Mandler, Daniel

doi:10.1016/s0022-0728(00)00294-1

Cited by 60 publications

(68 citation statements)

References 81 publications

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“…Formation of self-assembled monolayers (SAMs) of thiols on gold surfaces is one of the best methods to functionalize electrodes in a controlled and uniform way [6]. Gold surfaces modified with 4-aminothiophenol (4-ATP) have been studied by different techniques, including electrochemistry [7,8], STM [9,10], XPS [10,11] and EXAFS [12]. These studies and others have shown that 4-ATP forms well-ordered monolayers on gold surfaces that are almost as dense as those of long-chain alkyl thiolates.…”

Section: Introductionmentioning

confidence: 99%

Enzymatic Anodes for Hydrogen Fuel Cells based on Covalent Attachment of Ni‐Fe Hydrogenases and Direct Electron Transfer to SAM‐Modified Gold Electrodes

et al. 2010

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Immobilization of hydrogenases onto electrodes is of great interest for developing biofuel cells that use H 2 as a fuel. In this way, hydrogenases replace Pt as electrocatalyst for oxidizing H 2 in the anode. We have developed a method of covalent bonding of Desulfovibrio gigas Ni-Fe hydrogenase and Desulfovibrio vulgaris Hildenborough Ni-Fe-Se hydrogenase to gold electrodes modified with a self assembled monolayer (SAM) of 4-aminothiophenol for measuring high electrocatalytic currents of H 2 -oxidation in the absence of redox mediators. Electrochemical measurements and atomic force microscopy characterization show that direct electron transfer between enzyme and the Au support is due to formation of an organized monolayer of hydrogenase over the SAM-modified surface.

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Section: Introductionmentioning

confidence: 99%

Enzymatic Anodes for Hydrogen Fuel Cells based on Covalent Attachment of Ni‐Fe Hydrogenases and Direct Electron Transfer to SAM‐Modified Gold Electrodes

et al. 2010

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“…Among them, SAMs based on aromatic thiols have been vastly studied [13,14]. The formation of organic monolayers by self-assembly is directed by a specific interaction between a terminal functional group and the surface, in this case, the bond formed between the thiol sulphur and the metal.…”

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confidence: 99%

Spectroelectrochemical behavior of 4-aminobenzenethiol on nanostructured platinum and silver electrodes

Vidal‐Iglesias¹,

Solla-Gullón²,

Rodes³

et al. 2015

Surface Science

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The adsorption of 4-aminobenzenethiol (4-ABT) on Ag and Pt nanoparticles is studied by spectroelectrochemical means (cyclic voltammetry, Surface-Enhanced Raman Spectroscopy (SERS) and Surface-Enhanced Infrared Reflection Absorption Spectroscopy (SEIRAS). Similar SERS spectra are obtained when 4-ABT is adsorbed on platinum and silver nanostructured substrates. In addition, unless a low power density of the laser is used, these spectra show, both under open circuit conditions and when applying electrode potentials above -0.50 V, bands not observed in the normal Raman spectrum of 4-ABT. These bands disappear when the electrode potential is shifted to more negative values. Conversely, the SEIRA spectra of 4-ABT adsorbed on Ag do not show any significant change with the electrode potential, which indicates that there are not new species electrochemically formed in the range of potentials considered, which include some anodic and cathodic processes as shown in the corresponding cyclic voltammograms. In this regard, SERS measurements put in evidence the time dependence of the spectra obtained at potentials above -0.50 V just after switching on the laser suggesting the formation of new species, probably dimercaptoazobenzene (4-4'-DMAB), formed by a photochemical process of the adsorbed 4-ABT.

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“…[19][20][21][22][23][24][25][26] In order to direct metal deposition, SAMs have been patterned by micro-contact printing, [27][28][29] deep UV photolithography 8,12,20,24,30 or E-beam lithography. 31 The use of soft UV (365 nm) photolithography of ortho-nitrobenzyl protected SAMs provides a potentially attractive alternative since this offers much greater control over the chemical functionality of the surface.…”

Section: Introductionmentioning

confidence: 99%

Reversible metallisation of soft UV patterned substrates

et al. 2014

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ABSTRACT:Soft UV (365 nm) patterning of ortho-nitrobenzyl functionalized thiol-on-gold self-assembled monolayers (SAMs) using acid catalysis, produces surfaces which can be used for the selective electro-deposition of copper. Exploiting the difference in the reduction peak potential between the photolyzed and the masked regions of the SAM allows copper to be deposited selectively on those areas that have been exposed to the light. The copper can be removed by raising the electrode potential. The process is fully reversible so that depositing a pattern of copper and removing it again is something that can be repeated many times. The copper deposited on the photolyzed regions, like copper deposited on bare gold, forms a film of copper oxide, and so it is presumably formed on top of the SAM. Preliminary results for two-photon photocleavage suggest that it is also possible to implement patterning with subwavelength features.

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Electrochemistry and structure of the isomers of aminothiophenol adsorbed on gold

Cited by 60 publications

References 81 publications

Enzymatic Anodes for Hydrogen Fuel Cells based on Covalent Attachment of Ni‐Fe Hydrogenases and Direct Electron Transfer to SAM‐Modified Gold Electrodes

Enzymatic Anodes for Hydrogen Fuel Cells based on Covalent Attachment of Ni‐Fe Hydrogenases and Direct Electron Transfer to SAM‐Modified Gold Electrodes

Spectroelectrochemical behavior of 4-aminobenzenethiol on nanostructured platinum and silver electrodes

Reversible metallisation of soft UV patterned substrates

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