Electronic tongues and aptasensors

Dias, Luís G.; Meirinho, Sofia G.; Veloso, Ana C. A.; Rodrigues, L. R.; Peres, António M.

doi:10.1016/b978-0-08-100741-9.00013-9

Cited by 11 publications

(13 citation statements)

References 107 publications

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“…The current is immediately measured before the pulse application and at the end of the pulse, then the difference between them is recorded [ 67 ]. SWV perturbation signal shows a waveform formed by a series of pulses increasing along a linear baseline where the resulting current is determined by the difference between the current measurement in the forward and backward pulses [ 68 , 69 ]. LSV and CV are commonly used for exploratory purposes, while DPV and SWV are used for quantitative determinations [ 70 , 71 ].…”

Section: Fundamentals Of the Electrochemical Sensorsmentioning

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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Section: Fundamentals Of the Electrochemical Sensorsmentioning

confidence: 99%

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

et al. 2021

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“…Pulse voltammetry has greatly reduced this charging current by progressively applying short pulses over time. These pulses are assigned within a potential step such that the current before the end of a pulse (I 1 ) and just before the application of a pulse (I 2 ) is subtracted to obtain the current output in a pulse (Figure 5A) [104]. The cumulative current over a certain potential range is plotted against the potential to obtain a differential pulse voltammogram (Figure 5B) [104].…”

Section: Differential Pulse Voltammetry (Dpv)mentioning

confidence: 99%

“…These pulses are assigned within a potential step such that the current before the end of a pulse (I 1 ) and just before the application of a pulse (I 2 ) is subtracted to obtain the current output in a pulse (Figure 5A) [104]. The cumulative current over a certain potential range is plotted against the potential to obtain a differential pulse voltammogram (Figure 5B) [104]. The magnitude of the charging current, in this case, is so small that the DPV gives a better result in terms of sensitivity compared to CV.…”

Section: Differential Pulse Voltammetry (Dpv)mentioning

confidence: 99%

Carbon-Based Quantum Dots for Electrochemical Detection of Monoamine Neurotransmitters—Review

et al. 2020

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Imbalance in the levels of monoamine neurotransmitters have manifested in severe health issues. Electrochemical sensors have been designed for their determination, with good sensitivity recorded. Carbon-based quantum dots have proven to be an important component of electrochemical sensors due to their high conductivity, low cytotoxicity and opto-electronic properties. The quest for more sensitive electrodes with cheaper materials led to the development of electrochemical sensors based on carbon-based quantum dots for the detection of neurotransmitters. The importance of monoamine neurotransmitters (NTs) and the good electrocatalytic activity of carbon and graphene quantum dots (CQDs and GQDs) make the review of the efforts made in the design of such sensors for monoamine NTs of huge necessity. The differences and the similarities between these two quantum dots are highlighted prior to a discussion of their application in electrochemical sensors over the last ten years. Compared to other monoamine NTs, dopamine (DA) was the most studied with GQDs and CQD-based electrochemical sensors.

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“…In a broader sense, E-tongues are systems composed of one or more arrays of chemical sensors, namely electrochemical, coupled with appropriate multivariate data processing techniques. The basic concepts and principles regarding the two most common electrochemical techniques associated (i.e., potentiometry and voltammetry) to the E-tongues have been recently addressed in detail [79,81].…”

Section: Electrochemical Sensor Devices For Honey Evaluation: Overviementioning

confidence: 99%

“…A number of books, book chapters and review papers have been devoted to this important issue [73][74][75][76][77][78]. Also, their potential use for biomedical applications has been recently reviewed [79]. Thus, in this review a detailed survey and discussion is carried out focusing the problematic and challenge of applying E-tongues for honey evaluation; a food product highly appreciated by consumers due to the physicochemical, nutritional, biological and therapeutic known properties.…”

Section: Introductionmentioning

confidence: 99%

Honey Evaluation Using Electronic Tongues: An Overview

et al. 2018

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Honey-rich composition in biologically active compounds makes honey a food products highly appreciated due to the nutritional and healthy properties. Food-manufacturing is very prone to different types of adulterations and fraudulent labelling making it urgent to establish accurate, fast and cost-effective analytical techniques for honey assessment. In addition to the classical techniques (e.g., physicochemical analysis, microscopy, chromatography, immunoassay, DNA metabarcoding, spectroscopy), electrochemical based-sensor devices have arisen as reliable and green techniques for food analysis including honey evaluation, allowing in-situ and on-line assessment, being a user-friendly procedure not requiring high technical expertise. In this work, the use of electronic tongues, also known as taste sensor devices, for honey authenticity and assessment is reviewed. Also, the versatility of electronic tongues to qualitative (e.g., botanical and/or geographical origin assessment as well as detection of adulteration) and quantitative (e.g., assessment of adulterants levels, determination of flavonoids levels or antibiotics and insecticides residues, flavonoids) honey analysis is shown. The review is mainly focused on the research outputs reported during the last decade aiming to demonstrate the potentialities of potentiometric and voltammetric multi-sensor devices, pointing out their main advantages and present and future challenges for becoming a practical quality analytical tool at industrial and commercial levels.

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Electronic tongues and aptasensors

Cited by 11 publications

References 107 publications

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

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

Carbon-Based Quantum Dots for Electrochemical Detection of Monoamine Neurotransmitters—Review

Honey Evaluation Using Electronic Tongues: An Overview

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