Self-assembled monolayers on Au microelectrodes

Marisa Sheffer; Vincent Vivier; Daniel Mandler

doi:10.1016/j.elecom.2007.10.008

Self-assembled monolayers on Au microelectrodes

Marisa Sheffer, Vincent Vivier, Daniel Mandler^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Long chain alkanethiols self-assembled monolayers (SAMs) formed on Au microelectrodes showed higher sensitivity towards defects than the same monolayers on macroelectrodes. The analysis of cyclic voltammetry and electrochemical impedance spectroscopy (EIS) experiments performed on covered microelectrodes were consistent with the formation of pinholes of about 10 nm in diameter. Moreover, the EIS data exhibited a specific behavior that was interpreted invoking the short circuiting of the pinholes impedance by the surrounding surface of the microelectrode in the high frequency domain, whereas in the low frequencies, the surface covered by the SAM was assume to act as an insulator.

Original language	English
Pages (from-to)	2827-2832
Number of pages	6
Journal	Electrochemistry Communications
Volume	9
Issue number	12
DOIs	https://doi.org/10.1016/j.elecom.2007.10.008
State	Published - Dec 2007

Bibliographical note

Funding Information:
This work is supported by the Israel Science Foundation (contract 200/02).

Keywords

Electrochemical impedance spectroscopy
Microelectrode
Self-assembled monolayer

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10.1016/j.elecom.2007.10.008

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title = "Self-assembled monolayers on Au microelectrodes",

abstract = "Long chain alkanethiols self-assembled monolayers (SAMs) formed on Au microelectrodes showed higher sensitivity towards defects than the same monolayers on macroelectrodes. The analysis of cyclic voltammetry and electrochemical impedance spectroscopy (EIS) experiments performed on covered microelectrodes were consistent with the formation of pinholes of about 10 nm in diameter. Moreover, the EIS data exhibited a specific behavior that was interpreted invoking the short circuiting of the pinholes impedance by the surrounding surface of the microelectrode in the high frequency domain, whereas in the low frequencies, the surface covered by the SAM was assume to act as an insulator.",

keywords = "Electrochemical impedance spectroscopy, Microelectrode, Self-assembled monolayer",

author = "Marisa Sheffer and Vincent Vivier and Daniel Mandler",

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AU - Vivier, Vincent

AU - Mandler, Daniel

N1 - Funding Information: This work is supported by the Israel Science Foundation (contract 200/02).

PY - 2007/12

Y1 - 2007/12

N2 - Long chain alkanethiols self-assembled monolayers (SAMs) formed on Au microelectrodes showed higher sensitivity towards defects than the same monolayers on macroelectrodes. The analysis of cyclic voltammetry and electrochemical impedance spectroscopy (EIS) experiments performed on covered microelectrodes were consistent with the formation of pinholes of about 10 nm in diameter. Moreover, the EIS data exhibited a specific behavior that was interpreted invoking the short circuiting of the pinholes impedance by the surrounding surface of the microelectrode in the high frequency domain, whereas in the low frequencies, the surface covered by the SAM was assume to act as an insulator.

AB - Long chain alkanethiols self-assembled monolayers (SAMs) formed on Au microelectrodes showed higher sensitivity towards defects than the same monolayers on macroelectrodes. The analysis of cyclic voltammetry and electrochemical impedance spectroscopy (EIS) experiments performed on covered microelectrodes were consistent with the formation of pinholes of about 10 nm in diameter. Moreover, the EIS data exhibited a specific behavior that was interpreted invoking the short circuiting of the pinholes impedance by the surrounding surface of the microelectrode in the high frequency domain, whereas in the low frequencies, the surface covered by the SAM was assume to act as an insulator.

KW - Electrochemical impedance spectroscopy

KW - Microelectrode

KW - Self-assembled monolayer

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Self-assembled monolayers on Au microelectrodes

Abstract

Bibliographical note

Keywords

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