Impedance spectroscopy of the potential response of MUO and AUT self-assembled monolayers on polycrystalline thin gold films

Zhang, Sanjun; Hugo, Nicolas; Li, Wenxue; Roland, Thibault; Berguiga, Lotfi; Elezgaray, Juan; Argoul, Françoise

doi:10.1016/j.jelechem.2009.02.007

Cited by 5 publications

(10 citation statements)

References 14 publications

(22 reference statements)

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“…We developed a method which allows to finely inspect these properties of SAMs through electrochemical impedance spectroscopy (EIS) [33].…”

Section: Self-assembled Monolayersmentioning

confidence: 99%

“…Finally, the SAM coated gold samples were well rinsed first with deionized water and absolute ethanol in sequence, and then dried with nitrogen gas. If not used immediately, the SAM/gold samples were stored for a few days in absolute ethanol in individual closed vessels [33].…”

Section: Preparation Of Samsmentioning

confidence: 99%

“…Impedance of SAMs coated gold films was measured with a conventional three-electrode electrochemical cell (the working electrode being the gold coated coverslip, 1 cm 2 of its surface being in contact with the small tank containing the reference and counter electrodes), using a SP-150 potentiostat, BioLogic (Meylan, France) [33]. The reference electrode was a Ag/AgCl microelectrode of 250 µm diameter, which was prepared from a silver wire in a pH = 7, I = 0.1 mol·L −1 ionic strength phosphate buffer, supplemented with 10 mmol·L −1 NaCl (PBCl buffer).…”

Section: Description Of Eis Measurementsmentioning

confidence: 99%

“…11(a)] to study the fine properties of SAMs. All potential values in this paper are given versus saturated calomel electrode [33]. Figure 10(a) illustrates the SAMs in an electrolyte.…”

Section: Description Of Eis Measurementsmentioning

confidence: 99%

“…10(c). In this case, C D is neglected, the resistance R represents the sum of the diffuse layer and bulk resistances [33]. The impedance of solid electrodes in the absence of faradaic reactions may deviate from a pure capacitive behavior if their surface is rough or inhomogeneous.…”

Section: Description Of Eis Measurementsmentioning

confidence: 99%

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Advances in surface plasmon resonance-based high throughput biochips

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“…We developed a method which allows to finely inspect these properties of SAMs through electrochemical impedance spectroscopy (EIS) [33].…”

Section: Self-assembled Monolayersmentioning

confidence: 99%

Section: Preparation Of Samsmentioning

confidence: 99%

Section: Description Of Eis Measurementsmentioning

confidence: 99%

“…11(a)] to study the fine properties of SAMs. All potential values in this paper are given versus saturated calomel electrode [33]. Figure 10(a) illustrates the SAMs in an electrolyte.…”

Section: Description Of Eis Measurementsmentioning

confidence: 99%

Section: Description Of Eis Measurementsmentioning

confidence: 99%

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Electrochemical Impedance Spectroscopy and its Applications

Lasia¹

2014

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Self-Assembled Monolayers, Biological Membranes, and Biosensors

Lasia

2013

Electrochemical Impedance Spectroscopy and Its Applications

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Adsorbed organic layers on surfaces are models for biological bilayers, lipid membranes, and biosensors. EIS is an important tool in the study of these materials. In this chapter, the study of self-assembled monolayers, bilayers, and biosensors will be presented. Self-Assembled MonolayersSelf-assembled monolayers (SAMs) [482][483][484] are usually formed by a spontaneous reaction of alkanethiols with solid metal surfaces (e.g., Au, Ag, Cu). They can also be prepared using the Langmuir-Blodgett method. They form well-ordered, close-packed monolayers and may be applied in the control of wetting and adhesion, chemical resistance, photosensitization, molecular recognition for sensor applications, in fundamental studies of electron transfer, and other applications. The chains might be easily functionalized with various groups, e.g., hydrophilic or redox groups, or become biocompatible. SAMs form a single hydrophobic layer of hydrocarbon chains, usually strongly linked to the metallic support; however, multiple layers might also be deposited. Thiols form chemically bonded monolayers Me-S-R (Fig. 12.1) where metal, Me, is gold.Usually, quite compact layers are obtained. The simplest electrical equivalent model represents the solution resistance in series with the capacitance of a SAM, R s C SAM (Fig. 12.2a). More detailed analysis reveals that the layers are rarely purely capacitive and their capacitance is in parallel with their resistance, R SAM , leading to a circuit: R s (C SAM R SAM ). Moreover, a diffuse double layer exists at the SAM/solution interface [485, 486]. In such a case, the electrical equivalent circuit contains a diffuselayer capacitance, C dl , in parallel with the resistance, R dl (Fig. 12.2b).

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Impedance spectroscopy of the potential response of MUO and AUT self-assembled monolayers on polycrystalline thin gold films

Cited by 5 publications

References 14 publications

Advances in surface plasmon resonance-based high throughput biochips

Advances in surface plasmon resonance-based high throughput biochips

Electrochemical Impedance Spectroscopy and its Applications

Self-Assembled Monolayers, Biological Membranes, and Biosensors

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