Electrochemical behavior of dopamine and ascorbic acid at dendritic Au rod surfaces: Selective detection of dopamine in the presence of high concentration of ascorbic acid

Ahn, Miri; Kim, Jongwon

doi:10.1016/j.jelechem.2012.08.012

Cited by 44 publications

(12 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…15 As LD, UA and AA are all electroactive, electrochemical methods are often utilized to the determination of these three species. 23,24 However, the direct redox reactions of these species at the bare electrodes take place at very similar potentials [25][26][27][28] and often suffer from a pronounced fouling effect, which results in a poor selectivity and reproducibility. 29,30 Also, the voltammetric sensing of neurotransmitter metabolites usually suffers from the interference of AA, which usually coexists in vivo as anion at high concentrations and possesses an oxidation potential close to that of neurotransmitter metabolites at the unmodified electrode.…”

Section: Hatefi-mehrjardi Et Almentioning

confidence: 99%

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Hatefi-Mehrjardi¹,

Karimi²,

Barani³

et al. 2017

ACSi

View full text Add to dashboard Cite

A selective and sensitive electrochemical sensor was studied for determination of levodopa (LD) in the presence of uric acid (UA) and ascorbic acid (AA) using poly-dianix blue and multi-walled carbon nanotubes (PDB/MWCNTs) modified glassy carbon electrode. Cyclic voltammetry, differential pulse voltammetry, and chronoamperometry methods were applied to investigate the electrocatalytic oxidation of LD, UA and AA in aqueous solutions. By DPV technique, LD, UA and AA give oxidation peaks at 0.380, 0.520 and 0.180 V, respectively. Under the optimized experimental conditions LD, UA and AA give a linear response in the range of 0.09-75 μmol L -1 , 0.3-110 μmol L -1 and 10-160 μmol L -1 , respectively. Accordingly, the obtained detection limits were 0.003, 0.002 and 0.023 μmol L -1 . The method provides a simple electrochemical sensor for successful determination of LD in human blood serum samples.

show abstract

Section: Hatefi-mehrjardi Et Almentioning

confidence: 99%

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Hatefi-Mehrjardi¹,

Karimi²,

Barani³

et al. 2017

ACSi

View full text Add to dashboard Cite

show abstract

“…3. Dendritic rod surfaces were produced by a simple one-step electrodeposition at À0.85 V from a solution containing 36 mM Au(I) ions complexed with sulfite anions; the total deposition charge density was 0.45 C cm À2 [42,56,57]. Nanospike Au surfaces were electrodeposited at 0.05 V with a deposition charge density of 0.31 C cm À2 from a solution containing 7 mM HAuCl 4 and 0.5 mM Pb(CH 3 COO) 2 [42,58].…”

Section: Electroplated Flat Surfacesmentioning

confidence: 99%

Electrochemical Preparation of Nanoresonators

Kudelski

2015

Handbook of Nanoelectrochemistry

View full text Add to dashboard Cite

In 1970s it was observed that the efficiency of Raman scattering for molecules placed in the optical nanoresonators may increase even more than seven orders of magnitude. Later, large increase of the efficiency of other optical processes (e.g., infrared absorption, fluorescence, or second harmonic generation) has been also reported for molecules placed in nanoresonators. Therefore, fabrication of electromagnetic nanoresonators and their applications for the construction of various analytical sensors are studied in many laboratories in the world. The first practically used electromagnetic nanoresonators have been formed electrochemically, and, although other methods have been developed since then, various types of such nanostructures are still being formed using different electrochemical methods.In this review different approaches used for the electrochemical formation of electromagnetic nanoresonators are discussed. Methods of the formation of single active-site nanoresonators, and of nanostructured surfaces containing a large number of places where the optical energy is concentrated, are presented. Fabrication of composite nanoresonators composed of at least two different materials is also briefly described.

show abstract

“…The key issue to electroanalytical chemistry lies in the development of ultrasensitive modified electrodes. Precious metal nanoparticles and nanoalloys modified electrodes have exhibited superior sensing performances (i.e., wide linear ranges, low detection limit, good stability and selectivity) [12][13][14], but their scarcity and cost has limited practical applications. To solve this problem, various transition metals or metal oxides modified electrodes have become ideal alternative modification materials [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

Liu

et al. 2018

Catalysts

View full text Add to dashboard Cite

Abstract:The morphology or shape of nanomaterials plays an important role in functional applications, especially in the electrochemical sensing performance of nanocomposites modified electrodes. Herein, the morphology-dependent electrochemical sensing properties of MnO 2 -reduced graphene oxide/glass carbon electrode (MnO 2 -RGO/GCE) toward dopamine detection were investigated. Firstly, various morphologies of nanoscale MnO 2 , including MnO 2 nanowires (MnO 2 NWs), MnO 2 nanorods (MnO 2 NRs), and MnO 2 nanotubes (MnO 2 NTs), were synthesized under different hydrothermal conditions. Then the corresponding MnO 2 -RGO/GCEs were fabricated via drop-casting and the subsequent electrochemical reduction method. The oxidation peak currents increase with the electrochemical activity area following the order of MnO 2 NWs-RGO/GCE, MnO 2 NTs-RGO/GCE, and MnO 2 NRs-RGO/GCE. The spatial models for MnO 2 NWs, MnO 2 NTs, and MnO 2 NRs are established and accordingly compared by their specific surface area, explaining well the evident difference in electrochemical responses. Therefore, the MnO 2 NWs-RGO/GCE is selected for dopamine detection due to its better electrochemical sensing performance. The response peak current is found to be linear with dopamine concentration in the range of 8.0 × 10 −8 mol/L-1.0 × 10 −6 mol/L and 1.0 × 10 −6 mol/L-8.0 × 10 −5 mol/L with a lower detection limit of 1 × 10 −9 mol/L (S/N = 3). Finally, MnO 2 NWs-RGO/GCE is successfully used for the determination of dopamine injection samples, with a recovery of 99.6-103%. These findings are of great significance for understanding the relationship between unlimited nanoparticle structure manipulation and performance improvement.

show abstract

Electrochemical behavior of dopamine and ascorbic acid at dendritic Au rod surfaces: Selective detection of dopamine in the presence of high concentration of ascorbic acid

Cited by 44 publications

References 29 publications

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Electrochemical Preparation of Nanoresonators

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

Contact Info

Product

Resources

About