Determination of serotonin on platinum electrode modified with carbon nanotubes/polypyrrole/silver nanoparticles nanohybrid

Cesarino, Ivana; Galesco, Heloisa Veronese; Machado, Sérgio Antônio Spínola

doi:10.1016/j.msec.2014.03.030

Cited by 63 publications

(31 citation statements)

References 25 publications

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“…P(EDOP)-SWNTs/GCE DPV 1.0 3 10 À7 -1.0 3 10 À5 5.0 3 10 À9 -[6] MIP-hemin Amperometry 1.0 3 10 À6 -1.0 3 10 À6 1.0 3 10 À3 Serum samples [22] CURC/GCE SWV 1.0 3 10 À7 -1.0 3 10 À5 3.0 3 10 À8 Human blood serum [38] Pt/MWCNT/PPy/AgNPs DPV 5.0 3 10 À7 -5.0 3 10 À6 1.5 3 10 À7 Plasmatic serum sample [16] MWCNT-Chitosan DPV 5.0 3 10 À8 -1.6 3 10 À5 5.0 3 10 À8 Serum samples [39] p(P3CA)/PGE AdDPSV 1.0 3 10 À8 -1.0 3 10 À6 2.5 3 10 À9 Blood serum Urine serum [19] Ion-selective electrode Potentiometry 2. …”

Section: Electrodesmentioning

confidence: 99%

“…fluorimetry [8], chemiluminescence [9], HPLC-ECD [10,11], LC-MS [12,13], coulometry [14], capillary electrophoresis [15]. For this purpose, various materials including multiwalled carbon nanotubes [6,7,16,17], graphene based structure [5,3,18], conductive polymers [19][20][21], metal nanoparticles [1,3], metal oxides [2,5], and molecular imprinted polymers [22] have been used as modifiers for the serotonin determination in the literature. In this regard, electrochemical techniques are considered as the alternative tool for clinical diagnostic of 5-HT due to simplicity, fast response, high sensitivity and selectivity, ability to sense in living organism and in-vivo real time detection [3].…”

Section: Introductionmentioning

confidence: 99%

“…Conductive polymers on the electrode surface with good uniformity can be prepared by electropolymerization procedure [23]. Cesarino et al [16] proposed a MWCNT-poly(pyrrole) and silver nanoparticles composite electrode as a serotonin sensor. In this sense, Ran et al [20] fabricated a sensor by MWCNT and chitosan doped poly(aminobenzene sulfonic acid) to determine serotonin levels.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

2018

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In this study, the multiwalled carbon nanotube‐poly (aniline) (MWCNT‐PANI) composite is successfully deposited on the glassy carbon electrode (GCE) by electropolymerization as an efficient and conventional route. The structural and chemical properties of the MWCNT‐PANI was investigated by various spectroscopic and analytical techniques, scanning electron microscopy (SEM), X‐Ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). After that, the electrochemical oxidation behavior of serotonin (5‐HT) in phosphate buffer solution (pH 7.4) was examined using cyclic voltammetry (CV). Besides, the MWCNT‐PANI/GCE used for the detection of 5‐HT with linear concentration range (1.0×10−7–1.2×10−5 mol L−1), low limit of detection (3.3×10−8 mol L−1) under differential pulse voltammetric (DPV) conditions. The proposed electrochemical sensor based on MWCNT‐PANI is both time and cost effective, has good reproducibility, high selectivity as well as stability for 5‐HT determination. The developed composite electrode was used to detect 5‐HT in synthetic urine sample and satisfactory results were obtained with high recoveries.

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Section: Electrodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

2018

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“…Nanomaterials based on metallic nanoparticles play an important role in electroanalysis and improve the analytical characteristics of the sensor. Metal nanoparticles, such as gold ,, platinum ,, silver , palladium , and antimony , are widely used in electroanalysis because of their unique characteristics that include large surface area to volume ratios, convenience of electron transfer, excellent conductivity and electrocatalytic activities. Among these metals, silver nanoparticles (AgNPs) display excellent catalytic, antibacterial, electrical, optical and surface‐enhanced Raman spectroscopic properties, and are being incorporated into materials that range from photovoltaics to biological and chemical sensors ,,.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silver Nanoparticle‐Graphene Composites for Electroanalysis Applications using Chemical and Electrochemical Methods

2016

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An electrochemical device was developed for the simultaneous determination of sulfamethoxazole (SMX) and trimethoprim (TMP) using differential pulse voltammetry and glassy carbon (GC) electrodes modified with reduced graphene oxide (rGO) and silver nanoparticle (AgNP) composites, synthesised using both chemical and electrochemical methods. The morphology and electrochemical behaviour of the GC electrodes modified with the rGO/AgNP (chemical method) and rGO‐AgNP (electrochemical method) composites were characterised by scanning electron microscopy and cyclic voltammetry. These techniques demonstrated that, in both methods, the graphene oxide was modified by the AgNPs, and the composite synthesised by the electrochemical method showed a better dispersion of the nanoparticles, resulting in an increase in the surface area compared to the rGO/AgNP composite. The GC/rGO‐AgNP electrode was evaluated and optimised for the simultaneous determination of SMX and TMP, achieving detection limits of 0.6 μmol L−1 for the SMX and 0.4 μmol L−1 for the TMP. The proposed GC/rGO‐AgNP electrochemical device was successfully applied to the simultaneous determination of SMX and TMP in wastewaters samples.

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“…Carbon nanotubes (CNTs) , graphene oxide (GO) and reduced graphene oxide (rGO) are examples of carbon‐based materials that can be used for electrodes modification. In particular, rGO modified with metal nanoparticles (MNPs), such as gold , silver , palladium and antimony offer a synergistic combination to improve electrochemical properties of this material. Different composites based on rGO‐MNPs have been developed for several applications.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Reduced Graphene Oxide Modified with Antimony and Copper Nanoparticles for Levofloxacin Oxidation

2018

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This work presents, for the first time, the oxidation mechanism of levofloxacin combining electrochemical experiments and molecular modelling techniques. Levofloxacin is one of the most widely used antibiotics in the world. The detection of this antibiotic is important, because it cannot be fully assimilated by the human organism, therefore levofloxacin is considerate a hazardous pollutant for environment. Sensors based on reduced graphene oxide (rGO) modified with antimony and copper nanoparticles (NPs) were synthesized, characterized and evaluated for the electrochemical detection of the levofloxacin. The morphological and electrochemical characterization of the composites confirmed that the rGO was modified with the metallic nanoparticles. Molecular modelling studies were performed applying Density Functional Theory (DFT) approach, which indicated that the mechanism of levofloxacin oxidation is given by the loss of two electrons: one from N14 atom and other from C13 atom of the levofloxacin molecule. The glassy carbon electrode (GCE) modified with the SbNPs/rGO and CuNPs/rGO composites were evaluated for the determination of levofloxacin using differential pulse voltammetry (DPV) and achieved detection limit of 4.1×10−8 mol L−1 and 1.7×10−8 mol L−1, respectively, presenting as alternative composites to be used in the analysis of antibiotics.

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Determination of serotonin on platinum electrode modified with carbon nanotubes/polypyrrole/silver nanoparticles nanohybrid

Cited by 63 publications

References 25 publications

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

Synthesis of Silver Nanoparticle‐Graphene Composites for Electroanalysis Applications using Chemical and Electrochemical Methods

Evaluation of Reduced Graphene Oxide Modified with Antimony and Copper Nanoparticles for Levofloxacin Oxidation

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