From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes

Drochss P. Valencia; Ana P.R. De Souza; Vinicius R. Gonçales; Jadielson L.S. Antonio; Susana I. Cordoba De Torresi; Mauro Bertotti

doi:10.1016/j.elecom.2013.10.033

From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes

Drochss P. Valencia, Ana P.R. De Souza, Vinicius R. Gonçales, Jadielson L.S. Antonio, Susana I. Cordoba De Torresi, Mauro Bertotti

Universidade de São Paulo

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

7 Scopus citations

Abstract

A random assembly of microelectrodes (RAMs) was fabricated by electrochemical reduction of 5-bromo-1,10-phenathroline in N,N-dimethylformamide (DMF), generating the 1,10-phenanthroline radical, which was covalently grafted on gold electrodes. After several potential cycles, the gold surface was partially blocked with an insulating film of 1,10-phenanthroline and the resulting modified electrode exhibited the characteristics of a RAMs for the electrochemical reduction of the reversible probe 1,4-benzoquinone in DMF. Scanning electron microscopy and atomic force microscopy were used to examine the morphology of the electrodeposited film and to characterize the existence of micro-regions of gold not coated by the 1,10-phenanthroline film.

Original language	English
Pages (from-to)	32-35
Number of pages	4
Journal	Electrochemistry Communications
Volume	38
DOIs	https://doi.org/10.1016/j.elecom.2013.10.033
State	Published - 2014
Externally published	Yes

Keywords

Atomic force microscopy
Electrochemical sensors
Microelectrode ensembles
Microelectrodes
Random assembly of microelectrodes
Scanning electron microscopy

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10.1016/j.elecom.2013.10.033

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Valencia, D. P., De Souza, A. P. R., Gonçales, V. R., Antonio, J. L. S., Cordoba De Torresi, S. I., & Bertotti, M. (2014). From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes. Electrochemistry Communications, 38, 32-35. https://doi.org/10.1016/j.elecom.2013.10.033

@article{e30af77ca62b44f7832be5601aed164e,

title = "From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes",

abstract = "A random assembly of microelectrodes (RAMs) was fabricated by electrochemical reduction of 5-bromo-1,10-phenathroline in N,N-dimethylformamide (DMF), generating the 1,10-phenanthroline radical, which was covalently grafted on gold electrodes. After several potential cycles, the gold surface was partially blocked with an insulating film of 1,10-phenanthroline and the resulting modified electrode exhibited the characteristics of a RAMs for the electrochemical reduction of the reversible probe 1,4-benzoquinone in DMF. Scanning electron microscopy and atomic force microscopy were used to examine the morphology of the electrodeposited film and to characterize the existence of micro-regions of gold not coated by the 1,10-phenanthroline film.",

keywords = "Atomic force microscopy, Electrochemical sensors, Microelectrode ensembles, Microelectrodes, Random assembly of microelectrodes, Scanning electron microscopy",

author = "Valencia, {Drochss P.} and {De Souza}, {Ana P.R.} and Gon{\c c}ales, {Vinicius R.} and Antonio, {Jadielson L.S.} and {Cordoba De Torresi}, {Susana I.} and Mauro Bertotti",

note = "Funding Information: Authors are thankful to FAPESP (Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado de S{\~a}o Paulo) and CNPq (Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico) for the financial support.",

year = "2014",

doi = "10.1016/j.elecom.2013.10.033",

language = "English",

volume = "38",

pages = "32--35",

journal = "Electrochemistry Communications",

issn = "1388-2481",

publisher = "Elsevier Inc.",

}

Valencia, DP, De Souza, APR, Gonçales, VR, Antonio, JLS, Cordoba De Torresi, SI & Bertotti, M 2014, 'From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes', Electrochemistry Communications, vol. 38, pp. 32-35. https://doi.org/10.1016/j.elecom.2013.10.033

From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes. / Valencia, Drochss P.; De Souza, Ana P.R.; Gonçales, Vinicius R. et al.
In: Electrochemistry Communications, Vol. 38, 2014, p. 32-35.

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

TY - JOUR

T1 - From a planar electrode to a random assembly of microelectrodes

T2 - A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes

AU - Valencia, Drochss P.

AU - De Souza, Ana P.R.

AU - Gonçales, Vinicius R.

AU - Antonio, Jadielson L.S.

AU - Cordoba De Torresi, Susana I.

AU - Bertotti, Mauro

N1 - Funding Information: Authors are thankful to FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) for the financial support.

PY - 2014

Y1 - 2014

N2 - A random assembly of microelectrodes (RAMs) was fabricated by electrochemical reduction of 5-bromo-1,10-phenathroline in N,N-dimethylformamide (DMF), generating the 1,10-phenanthroline radical, which was covalently grafted on gold electrodes. After several potential cycles, the gold surface was partially blocked with an insulating film of 1,10-phenanthroline and the resulting modified electrode exhibited the characteristics of a RAMs for the electrochemical reduction of the reversible probe 1,4-benzoquinone in DMF. Scanning electron microscopy and atomic force microscopy were used to examine the morphology of the electrodeposited film and to characterize the existence of micro-regions of gold not coated by the 1,10-phenanthroline film.

AB - A random assembly of microelectrodes (RAMs) was fabricated by electrochemical reduction of 5-bromo-1,10-phenathroline in N,N-dimethylformamide (DMF), generating the 1,10-phenanthroline radical, which was covalently grafted on gold electrodes. After several potential cycles, the gold surface was partially blocked with an insulating film of 1,10-phenanthroline and the resulting modified electrode exhibited the characteristics of a RAMs for the electrochemical reduction of the reversible probe 1,4-benzoquinone in DMF. Scanning electron microscopy and atomic force microscopy were used to examine the morphology of the electrodeposited film and to characterize the existence of micro-regions of gold not coated by the 1,10-phenanthroline film.

KW - Atomic force microscopy

KW - Electrochemical sensors

KW - Microelectrode ensembles

KW - Microelectrodes

KW - Random assembly of microelectrodes

KW - Scanning electron microscopy

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DO - 10.1016/j.elecom.2013.10.033

M3 - Article

AN - SCOPUS:84887789935

SN - 1388-2481

VL - 38

SP - 32

EP - 35

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -

From a planar electrode to a random assembly of microelectrodes: A new approach based on the electrochemical reduction of 5-bromo-1,10-phenanthroline at gold electrodes

Abstract

Keywords

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