Enhanced selectivity and stability of ruthenium purple-modified carbon fiber microelectrodes for detection of hydrogen peroxide in brain tissue

Ledo, Ana; Fernandes, Eliana; Brett, Christopher M.A.; Barbosa, Rui M.

doi:10.1016/j.snb.2020.127899

Cited by 16 publications

(4 citation statements)

References 63 publications

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“…Indeed, PB remains a good option for the development of a disposable glucose sensor but its limitation in long contact with H 2 O 2 is not applicable for one-use sensor. Another strategy was recently reported in the literature to lower the detection potentials of H 2 O 2, is to use Ruthenium Purple (RP) as an alternative to the PB material that seems to present better stability over time [129][130][131].…”

Section: Electrochemical Enzymatic Glucose Sensormentioning

confidence: 99%

Insight into continuous glucose monitoring: from medical basics to commercialized devices

et al. 2023

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According to the latest statistics, more than 537 million people around the world struggle with diabetes and its adverse consequences. As well as acute risks of hypo-or hyper-glycemia, long-term vascular complications may occur, including coronary heart disease or stroke, as well as diabetic nephropathy leading to end-stage disease, neuropathy or retinopathy. Therefore, there is an urgent need to improve diabetes management to reduce the risk of complications but also to improve patient's quality life. The impact of continuous glucose monitoring (CGM) is well recognized, in this regard. The current review aims at introducing the basic principles of glucose sensing, including electrochemical and optical detection, summarizing CGM technology, its requirements, advantages and disadvantages. The role of CGM systems in the clinical diagnostics/personal testing, difficulties in their utilization and recommendations are also discussed. In the end, challenges and prospects in future CGM systems are discussed and non-invasive, wearable glucose biosensors are introduced. Though the scope of this review is CGMs and provides information about medical issues and analytical principles, consideration of broader use will be critical in future if the right systems are to be selected for effective diabetes management.

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Section: Electrochemical Enzymatic Glucose Sensormentioning

confidence: 99%

Insight into continuous glucose monitoring: from medical basics to commercialized devices

et al. 2023

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“…It allows for a short-term accurate and selective evaluation of a low detection limit on low-cost instrumentation. Moreover, it is one of the most versatile methods because it holds a wide dynamic span, simple instrumentation, and easy miniaturisation, becoming suitable for quantifying changes in H 2 O 2 levels in vivo in the brain [ 42 ]. Furthermore, electrochemical technology based on the catalytic activity allows for an H 2 O 2 detection method of simple, fast, and cost-effective operation [ 43 ] once H 2 O 2 is an electroactive molecule that can be oxidised or reduced on the surface of a solid electrode.…”

Section: Hydrogen Peroxide Electrochemical Detectionmentioning

confidence: 99%

Low Platinum-Content Electrocatalysts for Highly Sensitive Detection of Endogenously Released H2O2

et al. 2022

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The commercial viability of electrochemical sensors requires high catalytic efficiency electrode materials. A sluggish reaction of the sensor’s primary target species will require a high overpotential and, consequently, an excessive load of catalyst material to be used. Therefore, it is essential to understand nanocatalysts’ fundamental structures and typical catalytic properties to choose the most efficient material according to the biosensor target species. Catalytic activities of Pt-based catalysts have been significantly improved over the decades. Thus, electrodes using platinum nanocatalysts have demonstrated high power densities, with Pt loading considerably reduced on the electrodes. The high surface-to-volume ratio, higher electron transfer rate, and the simple functionalisation process are the main reasons that transition metal NPs have gained much attention in constructing high-sensitivity sensors. This study has designed to describe and highlight the performances of the different Pt-based bimetallic nanoparticles and alloys as an enzyme-free catalytic material for the sensitive electrochemical detection of H2O2. The current analysis may provide a promising platform for the prospective construction of Pt-based electrodes and their affinity matrix.

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“…According to the previous literature, 34 the construction of the RP film was prepared by electrodeposition in a brilliant purple opaque RP dilute colloidal suspension with cyclic voltammetry scanning. The RP dilute colloidal suspension was prepared as follows.…”

Section: ■ Introductionmentioning

confidence: 99%

Facile Uniaxial Electrospinning Strategy To Embed CsPbBr₃ Nanocrystals with Enhanced Water/Thermal Stabilities for Reversible Fluorescence Switches

et al. 2022

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All-inorganic halide perovskite nanocrystals with their fascinating optical properties have drawn increasing attention as promising nanoemitters. However, due to the intrinsic poor colloidal stability against the external environment, the practical applications are greatly limited. Herein, a facile and effective strategy for the in situ encapsulation of CsPbBr3 NCs into highly dense multichannel polyacrylonitrile (PAN) nanofibers via a uniaxial electrospinning strategy is presented. Such a facile uniaxial electrospinning strategy enables the in situ formation of CsPbBr3 NCs in PAN nanofibers without the introduction of stabilizers. Significantly, the obtained CsPbBr3 nanofibers not only display intense fluorescence with a high quantum yield (≈48%) but also present high stability when exposed to water and air owing to the peripheral protecting matrix of PAN. After immersing CsPbBr3@PAN nanofiber films in water for 100 days, the quantum yield of CsPbBr3@PAN nanofibers maintained 87.5% of the original value, which was much higher than that using CsPbBr3 NCs. Furthermore, based on the spectral overlap between the electrochromic material of ruthenium purple and fluorescence of CsPbBr3@PAN nanofiber films with excellent water stability, a reversible fluorescence switch is constructed with good fatigue resistance, suggesting their promising applications.

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Enhanced selectivity and stability of ruthenium purple-modified carbon fiber microelectrodes for detection of hydrogen peroxide in brain tissue

Cited by 16 publications

References 63 publications

Insight into continuous glucose monitoring: from medical basics to commercialized devices

Insight into continuous glucose monitoring: from medical basics to commercialized devices

Low Platinum-Content Electrocatalysts for Highly Sensitive Detection of Endogenously Released H2O2

Facile Uniaxial Electrospinning Strategy To Embed CsPbBr₃ Nanocrystals with Enhanced Water/Thermal Stabilities for Reversible Fluorescence Switches

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Enhanced selectivity and stability of ruthenium purple-modified carbon fiber microelectrodes for detection of hydrogen peroxide in brain tissue

Cited by 16 publications

References 63 publications

Insight into continuous glucose monitoring: from medical basics to commercialized devices

Insight into continuous glucose monitoring: from medical basics to commercialized devices

Low Platinum-Content Electrocatalysts for Highly Sensitive Detection of Endogenously Released H2O2

Facile Uniaxial Electrospinning Strategy To Embed CsPbBr3 Nanocrystals with Enhanced Water/Thermal Stabilities for Reversible Fluorescence Switches

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Product

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Facile Uniaxial Electrospinning Strategy To Embed CsPbBr₃ Nanocrystals with Enhanced Water/Thermal Stabilities for Reversible Fluorescence Switches