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Sensors 2013, 13(7), 8079-8094; doi:10.3390/s130708079
Article

Fabrication of a Polyaniline Ultramicroelectrode via a Self Assembled Monolayer Modified Gold Electrode

1
, 2
, 1
 and 1,*
Received: 16 April 2013; in revised form: 14 June 2013 / Accepted: 18 June 2013 / Published: 24 June 2013
(This article belongs to the Special Issue Ultramicroelectrode Electrochemistry - Theory and Applications)
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Abstract: Herein, we report a simple and inexpensive way for the fabrication of an ultramicroelectrode and present its characterization by electrochemical techniques. The fabrication of polyaniline UME involves only two steps: modification of a gold (Au) electrode by self assembled monolayers (SAM) and then electrodeposition of polyaniline film on this thiol-coated Au electrode by using cyclic voltammetry and constant potential electrolysis methods. Two types of self-assembled monolayers (4-mercapto-1-butanol, MB, and 11-mercaptoundecanoic acid, MUA) were used, respectively, to see the effect of chain length on microelectrode formation. Microelectrode fabrication and utility of the surface was investigated by cyclic voltammetric measurements in a redox probe. The thus prepared polyaniline microelectrode was then used for DNA immobilization. Discrimination between double-stranded DNA (dsDNA) and single-stranded DNA (ssDNA) was obtained with enhanced electrochemical signals compared to a polyaniline-coated Au electrode. Different modifications on the electrode surfaces were examined using scanning electron microscopy (SEM).
Keywords: polyaniline; self-assembled monolayer (SAM); microelectrode; gold electrode; DNA polyaniline; self-assembled monolayer (SAM); microelectrode; gold electrode; DNA
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Bolat, G.; Kuralay, F.; Eroglu, G.; Abaci, S. Fabrication of a Polyaniline Ultramicroelectrode via a Self Assembled Monolayer Modified Gold Electrode. Sensors 2013, 13, 8079-8094.

AMA Style

Bolat G, Kuralay F, Eroglu G, Abaci S. Fabrication of a Polyaniline Ultramicroelectrode via a Self Assembled Monolayer Modified Gold Electrode. Sensors. 2013; 13(7):8079-8094.

Chicago/Turabian Style

Bolat, Gulcin; Kuralay, Filiz; Eroglu, Gunes; Abaci, Serdar. 2013. "Fabrication of a Polyaniline Ultramicroelectrode via a Self Assembled Monolayer Modified Gold Electrode." Sensors 13, no. 7: 8079-8094.


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