A solid state sensor based polytyramine film modified electrode for the determination of dopamine and ascorbic acid in a moderately acidic solution

Khudaish, Emad A.; Al-Ajmi, Khawla Y.; Al-Harthi, S. H.; Al-Hinai, Ashraf T.

doi:10.1016/j.jelechem.2012.04.018

Cited by 13 publications

(9 citation statements)

References 53 publications

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“…Khudaish et al . have shown that polytyramine (PT) can exhibit redox capability with increased reactivity to the oxidation of dopamine and ascorbic acid . PT has also been incorporated with metal ions such as Ni(II) on the surface of an electrode, where the resulting films showed an increased activity for the oxidation of methanol .…”

Section: Introductionsupporting

confidence: 89%

“…Gooding et al have demonstrated a glucose biosensor with high tune-ability of the biosensor response, high selectivity and stability [22,26]. Khudaish et al have shown that polytyramine (PT) can exhibit redox capability with increased reactivity to the oxidation of dopamine and ascorbic acid [27]. PT has also been incorporated with metal ions [28][29] such as Ni(II) on the surface of an electrode, where the resulting films showed an increased activity for the oxidation of methanol [30].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced NADH Oxidation Using Polytyramine/Carbon Nanotube Modified Electrodes for Ethanol Biosensing

et al. 2017

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Polytyramine (PT) has been electro‐deposited onto multi‐walled carbon nanotube (MWCNT) modified glassy carbon (GC) electrodes via oxidation of tyramine in 0.1 M H3PO4 by cycling the potential over the range of −400 mV to 1300 mV (versus Ag/AgCl). The reactivity of the resulting chemically‐modified electrodes was characterized using cyclic voltammetry in the presence and absence of reduced nicotinamide adenine dinucleotide (NADH). The modified electrodes displayed electrochemical activity due to the formation of quinone species and were catalytically active towards NADH oxidation by lowering the oxidation peak potential by 170 mV compared to the value of the MWCNT modified electrode with a peak potential of 180±10 mV (versus Ag/AgCl). The MWCNT/PT surface was further characterized using SEM and XPS methods, which indicated that a thin polymeric film had been formed on the electrode surface. The present work demonstrates the advantage of using PT as a platform that combines both the immobilization of alcohol dehydrogenase (ADH) and the mediation of NADH oxidation at a low overpotential essential to the design of high performance ethanol biosensors, all within an easily electropolymerizable film. The resulting biosensor displayed an ethanol sensitivity of 4.28±0.06 μA mM−1 cm−2, a linear range between 0.1 mM and 0.5 mM and a detection limit of 10 μM.

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Section: Introductionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Enhanced NADH Oxidation Using Polytyramine/Carbon Nanotube Modified Electrodes for Ethanol Biosensing

et al. 2017

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“…670 Very well resolved symmetry and peak separation during DA and AscA simultaneous determination were obtained with a thin film of polytyramine on a carbon electrode (surface roughness = 0.7 nm, limit of detection = 142 nM and 331 nM, respectively). 671 Sensors made of electrochemically deposited polycarbazole (PCz) and poly(carbazole-co-p-tolylsulfonyl pyrrole) (PCz-cop-Tsp) films on single carbon fiber microelectrodes showed an amperometric response to DA concentrations with a limit of detection = 0.27 μM for PCz and 0.5 μM for P(Cz-co-p-Tsp). 672 Enhanced electrocatalytic performance toward the oxidation of DA can be obtained by improving the electron transfer within the CP.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Conducting Polymers in the Fields of Energy, Environmental Remediation, and Chemical–Chiral Sensors

et al. 2018

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Conducting polymers (CPs), thanks to their unique properties, structures made on-demand, new composite mixtures, and possibility of deposit on a surface by chemical, physical, or electrochemical methodologies, have shown in the last years a renaissance and have been widely used in important fields of chemistry and materials science. Due to the extent of the literature on CPs, this review, after a concise introduction about the interrelationship between electrochemistry and conducting polymers, is focused exclusively on the following applications: energy (energy storage devices and solar cells), use in environmental remediation (anion and cation trapping, electrocatalytic reduction/oxidation of pollutants on CP based electrodes, and adsorption of pollutants) and finally electroanalysis as chemical sensors in solution, gas phase, and chiral molecules. This review is expected to be comprehensive, authoritative, and useful to the chemical community interested in CPs and their applications.

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“…Moreover, the phenolic functionality can be easily oxidized for initiation of a polymeric reaction and formation by propagation steps for a final generation of the polymer [7,8]. Polytyramine (Ptyr) film deposited on different substrates under various experimental conditions has been studied to understand its structure, composition, thermal and mechanical properties, along with its conductivity for sensing applications [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A Surface Network Based on Polytyramine/ Gold Nanoparticles: Characterization, Kinetics, Thermodynamics and Selective Determination of Norepinephrine

Khudaish

Al-Maskari²

2021

SQU Journal for Science

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A solid-state sensor was fabricated by a spontaneous electrochemical deposition of polytyramine (Ptyr) film onto a glassy carbon electrode (GCE) which was further peripherally supported by gold nanoparticles (AuNPs). The surface materials of the developed sensor (AuNPs.Ptyr-GCE) were characterized by X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The rate constant of charge transfers (kct) of the as-prepared sensor (8.77 × 10-4 cm/s) was evaluated by fitting the charge transfer resistance (Rct) data in the presence of ferric-ferrous hexacyanide redox couple solution, [Fe(CN)6]3-/4-. The voltammetric behavior of norepinephrine (NOR) was confirmed to follow an irreversible reaction mechanism at which the estimated diffusion coefficient value was 7.39 × 10-5 cm2/s. The sensor showed a large enhancement on NOR oxidation and comparatively lowered its detection limit (DL3s) to 0.130 mM (22 ppb). It was also applied for selective determination of NOR in the presence of high concentrations of ascorbic acid (AA) and uric acid (UA). The interference study highlighted the great stability of the proposed sensor by generating a similar sensitivity as in the pure NOR solution. The analytical performance of the proposed system was validated successfully for pharmaceutical and biological samples with tolerable recovery percentages.

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A solid state sensor based polytyramine film modified electrode for the determination of dopamine and ascorbic acid in a moderately acidic solution

Cited by 13 publications

References 53 publications

Enhanced NADH Oxidation Using Polytyramine/Carbon Nanotube Modified Electrodes for Ethanol Biosensing

Enhanced NADH Oxidation Using Polytyramine/Carbon Nanotube Modified Electrodes for Ethanol Biosensing

Conducting Polymers in the Fields of Energy, Environmental Remediation, and Chemical–Chiral Sensors

A Surface Network Based on Polytyramine/ Gold Nanoparticles: Characterization, Kinetics, Thermodynamics and Selective Determination of Norepinephrine

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