Physiological level and selective electrochemical sensing of dopamine by a solution processable graphene and its enhanced sensing property in general

Ramachandran, Aswathi; Panda, Sriniwas; Sandhya, K

doi:10.1016/j.snb.2017.10.094

Cited by 35 publications

(25 citation statements)

References 38 publications

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“…Hence, the structure of N-GQD with dominant proportions of graphitic-N and pyrrolic-N, as deduced from the characterization results, can effectively enhance its sensing performance. In addition, the sensing behavior of N-GQD/GCE could have been further enhanced by the molecular interactions between the N-GQD and the analyte molecules such as ring stacking and π–π interactions due to the aromatic structures, electrostatic interactions, and hydrogen bonding interactions promoted by the hydroxyl groups (−OH) and the edge groups such as −NH and −NH 2 on the N-GQD toward nitrophenols. The earlier sensing studies of our group are evident of the better and stronger the interactions or affinity between the analyte and the electrode material, leading to superior and selective EC sensing performances of the electrode due to the proximity for one reason and for other reasons which may be specific. , An illustration which represents the enhanced sensing property toward TNP in DPV upon modification of GCE to N-GQD/GCE is shown in Scheme .…”

Section: Results and Discussionmentioning

confidence: 99%

“…The earlier sensing studies of our group are evident of the better and stronger the interactions or affinity between the analyte and the electrode material, leading to superior and selective EC sensing performances of the electrode due to the proximity for one reason and for other reasons which may be specific. 54,55 An illustration which represents the enhanced sensing property toward TNP in DPV upon modification of GCE to N-GQD/ GCE is shown in Scheme 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Polyaniline-Derived Nitrogen-Doped Graphene Quantum Dots for the Ultratrace Level Electrochemical Detection of Trinitrophenol and the Effective Differentiation of Nitroaromatics: Structure Matters

Ramachandran

Sandhya

2019

ACS Sustainable Chem. Eng.

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Highly crystalline and aromatic nitrogen-doped graphene quantum dots (N-GQDs) which demonstrate unparalleled electrochemical sensing properties toward nitroaromatics were made from a single source, polyaniline (PANI), by a simple hydrothermal synthetic strategy. The higher sensitivity and the effective differentiation between different nitro compounds exhibited by the N-GQD is evidence of its potential as a sensor for nitro compounds, especially the nitroaromatics. The N-GQD modified glassy carbon electrode (N-GQD/GCE) exhibited record sensitivity for 2,4,6-trinitrophenol (TNP) with a limit of detection (LOD) as low as 0.2 ppb (∼200 ng/l or 1 nM), which is the lowest of the reported values, the previous lowest is in micromolar (μM) levels and extended the remarkable sensing property in real water samples as well. The superior and selective sensing behavior of N-GQD toward TNP and other nitroaromatics is assigned to the richly N-doped aromatic structure of the N-GQD from the precursor PANI, which can possibly promote closer and selective molecular interactions with nitroaromatic compounds through ring stacking, π–π, or hydrogen bonding or a combination of these, and the enhanced conductivity and improved electron transfer ability due to the in situ N-doping.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Polyaniline-Derived Nitrogen-Doped Graphene Quantum Dots for the Ultratrace Level Electrochemical Detection of Trinitrophenol and the Effective Differentiation of Nitroaromatics: Structure Matters

Ramachandran

Sandhya

2019

ACS Sustainable Chem. Eng.

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“…There are works that determine DA, AA, UA, and tryptophan simultaneously [27][28][29] nonetheless, it is still an issue the determination of DA and 5HT simultaneously in the presence of UA and AA using only carbon-based electrodes. A recent work has determined DA with a high sensibility (1nM) even though in this work DA is measured in different concentrations only in presence of AA [30].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin

Bonetto

Muñoz

Diz

et al. 2018

Electrochimica Acta

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Glassy carbon electrodes (GC) were modified with multiwalled carbon nanotubes (MWCNT/GC) and electrochemically treated first by applying an oxidation potential and then a reduction potential. The resulting electrodes were characterized via scanning electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and electrochemical techniques, particularly cyclic voltammetry using the redox probes Fe(CN) 6 3-/4and Ru(NH 3) 2+/3+ and electrochemical impedance spectroscopy using Fe(CN) 6 3-/4-. These modified electrodes showed an electrochemical determination selective for dopamine (DA)

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“…Higher electrocatalytic activity and lower LOD values were obtained for DA and ascorbic acid (AA) when compared with rGO. Prior the use, both rGO or pGr were first dispersed in DMF, then dropped over the pre-treated GCE carefully and allowed to dry for 24 h at room temperature [73].…”

Section: Non-enzymatic Electrochemical Sensorsmentioning

confidence: 99%

Latest Trends in Electrochemical Sensors for Neurotransmitters: A Review

Tavakolian-Ardakani

Hosu

Cristea

et al. 2019

Sensors

116

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Neurotransmitters are endogenous chemical messengers which play an important role in many of the brain functions, abnormal levels being correlated with physical, psychotic and neurodegenerative diseases such as Alzheimer's, Parkinson's, and Huntington's disease. Therefore, their sensitive and robust detection is of great clinical significance. Electrochemical methods have been intensively used in the last decades for neurotransmitter detection, outclassing more complicated analytical techniques such as conventional spectrophotometry, chromatography, fluorescence, flow injection, and capillary electrophoresis. In this manuscript, the most successful and promising electrochemical enzyme-free and enzymatic sensors for neurotransmitter detection are reviewed. Focusing on the activity of worldwide researchers mainly during the last ten years (2010–2019), without pretending to be exhaustive, we present an overview of the progress made in sensing strategies during this time. Particular emphasis is placed on nanostructured-based sensors, which show a substantial improvement of the analytical performances. This review also examines the progress made in biosensors for neurotransmitter measurements in vitro, in vivo and ex vivo.

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Physiological level and selective electrochemical sensing of dopamine by a solution processable graphene and its enhanced sensing property in general

Cited by 35 publications

References 38 publications

Polyaniline-Derived Nitrogen-Doped Graphene Quantum Dots for the Ultratrace Level Electrochemical Detection of Trinitrophenol and the Effective Differentiation of Nitroaromatics: Structure Matters

Polyaniline-Derived Nitrogen-Doped Graphene Quantum Dots for the Ultratrace Level Electrochemical Detection of Trinitrophenol and the Effective Differentiation of Nitroaromatics: Structure Matters

Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin

Latest Trends in Electrochemical Sensors for Neurotransmitters: A Review

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