Exploration of synergism between a polymer matrix and gold nanoparticles for selective determination of dopamine

Kumar, Sunil; Mathiyarasu, J.; Phani, K. L. N.

doi:10.1016/j.jelechem.2004.12.023

Cited by 163 publications

(81 citation statements)

References 43 publications

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“…These properties resulted in a rather poor selectivity and sensitivity for DA detection because both were oxidized more or less at the same potential. 4,5 Hence, both sensitivity and selectivity are very important factors in developing a DA sensor. Some approaches have been proposed for modifying the electrode surface by utilizing various materials or techniques, such as ion-exchange polymers, [6][7][8] inorganic materials, 9 carbon materials, 6 and self-assembled monolayers.…”

Section: Introductionmentioning

confidence: 99%

Dopamine Sensor Based on a Boron-Doped Diamond Electrode Modified with a Polyaniline/Au Nanocomposites in the Presence of Ascorbic Acid

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Dopamine Sensor Based on a Boron-Doped Diamond Electrode Modified with a Polyaniline/Au Nanocomposites in the Presence of Ascorbic Acid

et al. 2012

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“…CPs have been successfully used to detect dopamine (DA), [18][19][20][21][22][23] which is an important neurotransmitter of catecholamine in the human brain. 24 The very low concentration of DA in the extracellular fluid 25 provides a huge challenge for the detection of this analyte.…”

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confidence: 99%

A rational design for the selective detection of dopamine using conducting polymers

Fabregat

Casanovas

Redondo

et al. 2014

Phys. Chem. Chem. Phys.

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Poly(N-methylpyrrole) (PNMPy), poly(N-cyanoethylpyrrole) (PNCPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) films have been prepared using both single and two polymerization steps for the selective determination of low concentrations of dopamine, ascorbic acid and uric acid in tertiary mixtures.Analysis of the sensitivity and resolution parameters derived from the electrochemical response of such films indicates that PEDOT is the most appropriate for the unambiguous detection of the three species.Indeed, the performance of PEDOT is practically independent of the presence of both gold nanoparticles at the surface of the film and interphases inside the film, even though these two factors are known to improve the electroactivity of conducting polymers. Quantum mechanical calculations on model complexes have been used to examine the intermolecular interaction involved in complexes formed by PEDOT chains and oxidized dopamine, ascorbic acid and uric acid. Results show that such complexes are mainly stabilized by C-HÁ Á ÁO interactions rather than by conventional hydrogen bonds.In order to improve the sensitivity of PEDOT through the formation of specific hydrogen bonds, a derivative bearing a hydroxymethyl group attached to the dioxane ring of each repeat unit has been designed. Poly(hydroxymethyl-3,4-ethylenedioxythiophene) (PHMeDOT) has been prepared and characterized by FTIR, UV-vis spectroscopy, cyclic voltammetry, scanning electron microscopy and atomic force microscopy. Finally, the performance of PHMeDOT and PEDOT for the selective detection of the species mentioned above has been compared.

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“…The incorporation of NPs in conducting polymers has been achieved by self-assembly of chemically presynthesized NPs onto self-assembled monolayers (SAMs) [74], electrochemical deposition of chemically pre-synthesized NPs onto previously synthesized polymer films [75], electrochemical polymerization of the appropriate monomer in the presence of chemically pre-synthesized NPs [73], and layer-by-layer intercalation of the inorganic NPs into conducting polymer composite coatings [67,76]. In this area, PEDOT has been quite extensively studied for NPs incorporation into polymeric films [77,78], mainly due to its excellent stability and the possibility to prepare the corresponding PEDOT polymer matrix through electrochemical polymerization of the 3,4-ethylenedioxythiophene (EDOT) monomer in aqueous solution [79][80][81][82][83][84]. Another approach consists in the use of ultrasounds for NPs preparation [85].…”

Section: Pedot-metal-nanoparticles Composite-modified Electrodesmentioning

confidence: 99%

New Developments in Electrochemical Sensors Based on Poly(3,4-ethylenedioxythiophene)-Modified Electrodes

Lupu

2011

International Journal of Electrochemistry

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There is a growing demand for continuous, fast, selective, and sensitive monitoring of key analytes and parameters in the control of diseases and health monitoring, foods quality and safety, and quality of the environment. Sensors based on electrochemical transducers represent very promising tools in this context. Conducting polymers (CPs) have drawn considerable interest in recent years because of their potential applications in different fields such as in sensors, electrochemical displays, and in catalysis. Among the organic conducting polymers, poly(3,4-ethylenedioxythiophene) (PEDOT) and its derivatives have attracted particular interest due to their high stability and high conductivity. This paper summarizes mainly the recent developments in the use of PEDOTbased composite materials in electrochemical sensors.

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Exploration of synergism between a polymer matrix and gold nanoparticles for selective determination of dopamine

Cited by 163 publications

References 43 publications

Dopamine Sensor Based on a Boron-Doped Diamond Electrode Modified with a Polyaniline/Au Nanocomposites in the Presence of Ascorbic Acid

Dopamine Sensor Based on a Boron-Doped Diamond Electrode Modified with a Polyaniline/Au Nanocomposites in the Presence of Ascorbic Acid

A rational design for the selective detection of dopamine using conducting polymers

New Developments in Electrochemical Sensors Based on Poly(3,4-ethylenedioxythiophene)-Modified Electrodes

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