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

Bonetto, M. Celina; Muñoz, Fernando F.; Diz, Virginia; Sacco, Natalia J.; Cortón, Eduardo

doi:10.1016/j.electacta.2018.06.179

Cited by 28 publications

(6 citation statements)

References 42 publications

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“…Electrochemical characterisation of these electrodes is shown in Figure 2 for outer sphere redox species hexaamineruthenium (III) chloride. [21] In the vertical orientation print, clear voltammetric peaks were observed (Figure 2A, n=4), with significant reduction in the cathodic peak current (Ipc) in 0.4 mm print layer thickness when compared to 0.1 and 0.2 mm (Figure 2B, p<0.05, n=4). In addition, there was a significant increase in peak to peak separation (ΔE) in 0.3 mm (p<0.01) and 0.4 mm (p<0.001) when compared to 0.1 mm layer thickness (Figure 2C, n=4).…”

Section: Electrochemical Activity Varies With Orientation and Layer Thickness For Outer And Inner-sphere Redox Moleculesmentioning

confidence: 95%

Augmentation of conductive pathways in carbon black/PLA 3D-printed electrodes achieved through varying printing parameters

Abdalla

Hamzah²,

Keattch³

et al. 2020

Electrochimica Acta

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3D-printing of conductive carbon materials in sensing applications and energy storage devices has significant potential, however high resistivity of 3D-printed filaments poses a challenge. Strategies to enhance sensors post printing are time consuming and can reduce structural integrity. In this work, we investigated the effects different printing layer thickness and orientation can have on the electron transfer kinetics and resistivity of conductive materials. The response of these electrodes was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and imaging. Electrodes printed with the lowest layer thickness of 0.1 mm in a vertical orientation had the greatest conductivity. With increasing print layer thickness and printing in a horizontal orientation, the electrode was more resistive. This work is the first to demonstrate the significant impact 3D-printing parameters can have on the electron transfer kinetics of carbon conductive electrodes. The implications of this study are important in defining the manufacturing process of electrodes for all applications.

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Section: Electrochemical Activity Varies With Orientation and Layer Thickness For Outer And Inner-sphere Redox Moleculesmentioning

confidence: 95%

Augmentation of conductive pathways in carbon black/PLA 3D-printed electrodes achieved through varying printing parameters

Abdalla

Hamzah²,

Keattch³

et al. 2020

Electrochimica Acta

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“…The LOD and LDR reported here showed that this technique is technically an improvement over the work of Bonetto et al. [ 213 ]…”

Section: Detection Of Nts Using Cnt‐based Sensorsmentioning

confidence: 57%

“…LOD of 2.4 nM was reported for SE using this electrode in a DPV experiment. The LOD and LDR reported here showed that this technique is technically an improvement over the work of Bonetto et al [213] Table 2 summarizes the efforts made so far in the detection of SE using different CNT-based electrodes from year 2010 to date. This is with a view to visualizing the progress made thus far in the detection of the neurotransmitter.…”

Section: Cnts Enhanced Electrochemical Se Detection (2016-2019)mentioning

confidence: 73%

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Progress in electrochemical detection of neurotransmitters using carbon nanotubes/nanocomposite based materials: A chronological review

et al. 2020

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Neurotransmitters (NTs) are chemical compounds that play an important physiological role in the functioning of central nervous, renal, hormonal, and cardiovascular systems. Their function is to regulate neural interactions by reducing the permeability of gap junctions between adjacent neurons of the same type. The abnormal level may lead to diseases, such as Parkinson's disease, Huntington's disease, Alzheimer's diseases, and other neurological diseases. The devastating health hazards associated with the abnormal presence of NTs in biological systems coupled with the demerits of most modern detection methods necessitates the continuous development of novel electrochemical sensors. Carbon nanotube (CNT)-based sensors, as a result of the large surface area, biocompatibility, and chemical stability supplied by CNTs, have proven to offer massive sensitivity and low limit of detection (LOD). Its significance in sensors applications toward the detection of different group of compounds cannot be overemphasized. There are several review articles on NTs and their determination using different chemically modified electrodes and sensor platform. However, this review highlights the significance of notable NTs and the progress made in the last decade in the design of CNT-based sensors for the detection of common NTs. Secondly, the This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Currently, a huge variety of materials has been employed for building electrochemical sensors aiming to improve their properties such as electrical conductivity, surface area, and mechanical- and chemical stability [ 30 ]. The building material selection pretends to solve some problems of the electrochemical sensors like electrode fouling and overlapping of the redox potential of the molecules presented as analyte [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

et al. 2021

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Electrochemical sensors appear as low-cost, rapid, easy to use, and in situ devices for determination of diverse analytes in a liquid solution. In that context, conducting polymers are much-explored sensor building materials because of their semiconductivity, structural versatility, multiple synthetic pathways, and stability in environmental conditions. In this state-of-the-art review, synthetic processes, morphological characterization, and nanostructure formation are analyzed for relevant literature about electrochemical sensors based on conducting polymers for the determination of molecules that (i) have a fundamental role in the human body function regulation, and (ii) are considered as water emergent pollutants. Special focus is put on the different types of micro- and nanostructures generated for the polymer itself or the combination with different materials in a composite, and how the rough morphology of the conducting polymers based electrochemical sensors affect their limit of detection. Polypyrroles, polyanilines, and polythiophenes appear as the most recurrent conducting polymers for the construction of electrochemical sensors. These conducting polymers are usually built starting from bifunctional precursor monomers resulting in linear and branched polymer structures; however, opportunities for sensitivity enhancement in electrochemical sensors have been recently reported by using conjugated microporous polymers synthesized from multifunctional monomers.

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

Cited by 28 publications

References 42 publications

Augmentation of conductive pathways in carbon black/PLA 3D-printed electrodes achieved through varying printing parameters

Augmentation of conductive pathways in carbon black/PLA 3D-printed electrodes achieved through varying printing parameters

Progress in electrochemical detection of neurotransmitters using carbon nanotubes/nanocomposite based materials: A chronological review

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

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