High performance electrochemical sensors for dopamine and epinephrine using nanocrystalline carbon quantum dots obtained under controlled chronoamperometric conditions

Canevari, Thiago C.; Nakamura, Marcelo; Cincotto, Fernando Henrique; Melo, Fernando Menegatti de; Toma, Henrique E.

doi:10.1016/j.electacta.2016.05.108

Cited by 100 publications

(47 citation statements)

References 37 publications

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“…Till now, many approaches, including high‐performance liquid chromatography (HPLC), electrochemical sensing, immune assay, supercritical fluid chromatography and spectrophotometry etc., have been applied for the determination of MTZ. But these methods need expensive instruments, complicated operations and time‐consuming sample pretreatments, which greatly limit the detection efficiency of MTZ.…”

Section: Introductionmentioning

confidence: 99%

Detection of metronidazole in honey and metronidazole tablets using carbon dots‐based sensor via the inner filter effect

et al. 2018

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In this work, carbon dots (CDs) with a high quantum yield (22.3%) were easily prepared by hydrothermal pyrolysis of acid fuchsin 6B and hydrogen peroxide at 180°C for 10 h. The resultant CDs possess a narrow size distribution in the range of 2.6 to 3.2 nm and emit blue fluorescence. Interestingly, the absorption band of metronidazole (MTZ) centered at 318 nm can complementary overlap with the excitation band of the as-prepared CDs centered at 320 nm, resulting in an inner filter effect (IFE) in high efficiency. In fact, the fluorescence quenching of the CDs depends on the concentration of MTZ. Therefore, a simple method for the detection of MTZ can be established using the CDs-based sensor via the IFE. The linear range of the proposed method was 0-10 μg mL with the limit of detection as low as 0.257 μg mL . This CDs-based sensor had been applied for the detection of MTZ in honey and MTZ tablets with the recoveries in the range of 98.0% to 105.1% and 95.7% to 106.5%, respectively. Therefore, the as-prepared CDs have a potential to be developed as a MTZ sensor with high selectivity, sensitivity and accuracy.

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Section: Introductionmentioning

confidence: 99%

Detection of metronidazole in honey and metronidazole tablets using carbon dots‐based sensor via the inner filter effect

et al. 2018

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“…Likewise the diameter of the calix [6]arene molecule is 5 to 25 nm, as reported in the literature, 52 and normally the analyte interacts with the p stacking of the aromatic walls of calix [6] arene. Also Nikolelis and co-worker reported that a sensor based on solid supported lipid membranes with incorporated calix [4] resorcinarene is highly selective toward catecholamines. [53][54][55] In our case we used calix [6]arene which has a bigger cavity size than calix [4]arene.…”

Section: Resultsmentioning

confidence: 99%

“…2 From the point of view of a sensor, epinephrine detection is mainly accomplished by means of its ease in oxidization. [3][4][5][6] However, the fact that EP and dopamine (DA) have nearly the same oxidation potential poses a great challenge in EP detection. 7 Moreover, the oxidation product of EP forms a polymeric compound which blocks the electrode surface.…”

Section: Introductionmentioning

confidence: 99%

Cellular-membrane inspired surface modification of well aligned ZnO nanorods for chemosensing of epinephrine

et al. 2017

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“…Carbon nanoparticles, also known as C‐dots, were synthesized from the amperometrically controlled electrolysis of a 1‐propanol solution, during 8.5 h, as previously reported . They are very stable, presumably because of the presence of the functional groups (mainly carboxylate) generated at the surface, and remained active and luminescent in solution for more than a year.…”

Section: Methodsmentioning

confidence: 99%

Magnetite Nanoparticles Bonded Carbon Quantum Dots Magnetically Confined onto Screen Printed Carbon Electrodes and their Performance as Electrochemical Sensor for NADH

et al. 2017

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Hybrid magnetite/carbon quantum dots (MagNP/C‐dots) were prepared and their characterization performed by high resolution transmission electron microscopy (HR‐TEM), X‐ray diffraction (XRD) and X‐ray photoelectron spectroscopy (XPS). Because of their suitable magnetization and electrochemical properties, they were used as versatile electrode modifiers after magnetically confining onto screen printed carbon electrodes (SPE), with the aid of a miniature external magnet. The reported strategy introduces a convenient procedure for assembling modified electrodes, since the nanoparticles can be easily released by removing the magnet. The non‐enzymatic magnetic biosensor showed excellent performance in the determination of NADH at the concentration range 2×10−7 to 5×10−6 mol L−1, exhibiting a sensitivity of 0.15 μmol L−1 and detection limit of 20 nmol L−1. The MagNP/C‐dots/SPE sensor was also successfully applied for the determination of NADH in serum samples. The interference of typical biological molecules has also been investigated.

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High performance electrochemical sensors for dopamine and epinephrine using nanocrystalline carbon quantum dots obtained under controlled chronoamperometric conditions

Cited by 100 publications

References 37 publications

Detection of metronidazole in honey and metronidazole tablets using carbon dots‐based sensor via the inner filter effect

Detection of metronidazole in honey and metronidazole tablets using carbon dots‐based sensor via the inner filter effect

Cellular-membrane inspired surface modification of well aligned ZnO nanorods for chemosensing of epinephrine

Magnetite Nanoparticles Bonded Carbon Quantum Dots Magnetically Confined onto Screen Printed Carbon Electrodes and their Performance as Electrochemical Sensor for NADH

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