Gold Electrode Modified with a Self-Assembled Monolayer of Thiols as an Electrochemical Detector for Ionic Surfactants.

Kawaguchi, Tetsuo; Yamauchi, Yuji; Maeda, Hatsuo; Ohmori, Hidenobu

doi:10.1248/cpb.41.1601

Cited by 8 publications

(2 citation statements)

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“…Surprisingly, the reversible wave of ferricyanide was restored by addition of a surfactant such as trimethyldodecylammonium as was shown for long chain alkane thiols. 92,93 Electrografting of nitrobenzyl alcohol was also demonstrated by the observation of the reversible couple of the nitrobenzyl group after transferring the modified electrode to pure solvent. The water contact angle of carbon surfaces electrografted was measured with different alkanols.…”

Section: Alcoholsmentioning

confidence: 99%

Electrografting: a powerful method for surface modification

2011

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Electrografting refers to the electrochemical reaction that permits organic layers to be attached to solid conducting substrates. This definition can be extended to reactions involving an electron transfer between the substrate to be modified and the reagent, but also to examples where a reducing or oxidizing reagent is added to produce the reactive species. These methods are interesting as they provide a real bond between the surface and the organic layer. Electrografting applies to a variety of substrates including carbon, metals and their oxides, but also dielectrics such as polymers. Since the 1980s several methods have been developed, either by reduction or oxidation, and some of them have reached an industrial stage. This critical review describes the methods that are used for electrografting, their mechanism, the formation and growth of the layers as well as their applications (742 references).

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Section: Alcoholsmentioning

confidence: 99%

Electrografting: a powerful method for surface modification

2011

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“…The chemically sensitive film can be thick, up to several hundred microns, or as thin as a monolayer. A large body of work has been devoted to developing self-assembled monolayers (SAMs) that exhibit favorable sensing characteristics. − Sensors based on SAMs of organosulfur compounds on gold have been demonstrated using gravimetric, − optical, − and electrical transduction mechanisms, including coulometric, impedimetric, − amperometric, , and voltammetric − methods. In contrast, little work has been reported in discovering new physical transducers.…”

Section: Introductionmentioning

confidence: 99%

Langmuir Monolayer Flow across Hydrophobic Surfaces. 2. Sensor Development Using Langmuir Monolayer Flow

2000

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Two sensing mechanisms utilizing Langmuir monolayer flow, the pressure-driven movement of a Langmuir film into a hydrophobic surface−liquid interface, have been investigated and involve analyte interaction with either the flowing monolayer or stationary film. The sensing aspect is achieved through modulation of the bilayer formation rate. A sensor using this novel transduction mechanism was developed for Cd2+, based on the interaction of divalent cations with the carboxylic headgroup of the flowing monolayer. Aqueous divalent cations associate with an oleic acid monolayer, increasing its viscosity. As a result, the flow rate of the associated monolayer is slower than for the unassociated monolayer. A rudimentary pH sensor was also developed to exemplify flow-based sensing, in which oleyl alcohol flows into the interface between a mixed methyl-carboxylic acid terminated self-assembled monolayer modified gold electrode and water. The flow rate for this system was sensitive to subphase pH. Attenuation of the monolayer flow rate is dependent upon the relative surface concentration of the carboxylic acid moiety in the multicomponent surface monolayer. The major contribution to the modulation of the monolayer flow rate in this system is attributed to solvation thermodynamics of the carboxylate anion macroscopically averaged across the modified electrode surface.

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Electrochemical characterization of cationic surfactants? adsorption on a disturbed n-alkanethiolate self-assembled monolayer-modified polycrystalline gold electrode

2004

J Solid State Electrochem

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Gold Electrode Modified with a Self-Assembled Monolayer of Thiols as an Electrochemical Detector for Ionic Surfactants.

Cited by 8 publications

References 0 publications

Electrografting: a powerful method for surface modification

Electrografting: a powerful method for surface modification

Langmuir Monolayer Flow across Hydrophobic Surfaces. 2. Sensor Development Using Langmuir Monolayer Flow

Electrochemical characterization of cationic surfactants? adsorption on a disturbed n-alkanethiolate self-assembled monolayer-modified polycrystalline gold electrode

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