Non‐enzymatic Glucose Sensor Based on Nickel/Carbon Composite

Marini, Silvia; Mansour, N. Ben; Hjiri, M.; Dhahri, R.; Mır, L. El; Espro, Claudia; Bonavita, A.; Galvagno, S.; Neri, G.; Leonardi, Salvatore Gianluca

doi:10.1002/elan.201700687

Cited by 51 publications

(28 citation statements)

References 49 publications

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“…Upon addition of glucose, a positive shift of the anodic and cathodic peak potentials from 0.575 V to 0.652 V and 0.448 V to 0.481 V is also observed. The increase in redox potential may be attributed to a local pH change at the electrode surface due to the oxidation of glucose molecules and some oxidized intermediates on the active sites, which decreases the kinetics of glucose oxidation

true NiO / SCCNTs + normalH_{2} normalO \to NiO \cdot normalH_{2} normalO / SCCNT \to Ni (OH)_{2} / SCCNT

true Ni (OH)_{2} / SCCNT + OH^{-} \to NiO (OH) / SCCNT + normalH_{2} normalO + normale^{-}

true NiO (OH) / SCCNT + glucose \to Ni (OH)_{2} / SCCNT + glucolactone

…”

Section: Resultsmentioning

confidence: 99%

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Tuning the NiO Thin Film Morphology on Carbon Nanotubes by Atomic Layer Deposition for Enzyme‐Free Glucose Sensing

Raza

Movlaee

et al. 2018

ChemElectroChem

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Nanocomposites made of stacked‐cup carbon nanotubes coated with NiO (NiO/SCCNTs) via atomic layer deposition (ALD) were synthesized in order to obtain a material exhibiting enhanced and optimized electrochemical performance towards detections of glucose. The structure and morphology were characterized by transmission electron microscopy (TEM) and X‐ray diffraction (XRD). NiO deposited as nanocrystalline particles in the cubic modification, were well dispersed and directly anchored on SCCNTs forming a smooth particulate thin film, which becomes more dense with the increase of the number of ALD cycles. The NiO/SCCNTs samples with various thicknesses of the NiO coating (0.8 nm, 1.7 nm, 4.0 nm, 6.5 nm, 14.0 nm and 21.8 nm) were applied for enzyme‐free glucose sensing. Their electrochemical performance strongly depends on the thickness of the deposited NiO thin film. The best performing glucose sensors respond over a wide concentration range from 2 μM to 2.2 mM (R2=0.9979) with remarkably enhanced sensitivity (1252.3 μA cm−2 mM−1), with a limit of detection (LOD) of 0.10 μM (S/N=3) and with a fast response time (lower than 2 s). The significant performance improvement can be attributed to the conformal NiO coating, high surface to volume ratio and to the optimized thickness of the NiO thin film. The advantage of our sensors is also associated with the conductive supporting material (SCCNTs), simplicity of fabrication, high sensitivity, selectivity, stability and reproducibility for the rapid quantification of glucose.

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true NiO / SCCNTs + normalH_{2} normalO \to NiO \cdot normalH_{2} normalO / SCCNT \to Ni (OH)_{2} / SCCNT

true Ni (OH)_{2} / SCCNT + OH^{-} \to NiO (OH) / SCCNT + normalH_{2} normalO + normale^{-}

true NiO (OH) / SCCNT + glucose \to Ni (OH)_{2} / SCCNT + glucolactone

…”

Section: Resultsmentioning

confidence: 99%

“…The increase in redox potential may be attributed to a local pH change at the electrode surface due to the oxidation of glucose molecules and some oxidized intermediates on the active sites, which decreases the kinetics of glucose oxidation. [59][60][61][62]…”

Section: Electrocatalytic Oxidation Of Glucosementioning

confidence: 99%

Tuning the NiO Thin Film Morphology on Carbon Nanotubes by Atomic Layer Deposition for Enzyme‐Free Glucose Sensing

Raza

Movlaee

et al. 2018

ChemElectroChem

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“…Despite the lower quantity of nickel used in the formulation of the active material (1 wt % of Ni), the performances of the proposed N-CS/SPCE were comparable with other ones. Interestingly, the N-CS/SPCE showed an improved linear range and only slightly lower sensitivity than our previous sensor (PF/Ni30) having a high loading (30%) of nickel [27]. As silica is not electrochemically active, we believe that its main function is to disperse better nickel nanoparticles inside the carbon matrix.…”

Section: Amperometric Response Of the N-cs/spce Towards Glucosementioning

confidence: 59%

“…Figure 1a shows the XRD spectra of the N-CS powder where three distinct reflection peaks at 44 • , 51 • , and 76 • , matching with the (111), (200), (220) planes of metallic nickel (JCPDS 04-0850), can be observed. Metallic Ni comes from the reduction of NiO nanoparticles during the pyrolysis treatment in inert atmosphere [27]. The crystallite size of metallic nickel, calculated using Sherrer's equation from the full width at half maximum intensity (FWHM) measured on the (111) diffraction peak, was about 32 nm.…”

Section: Characterization Of the N-cs Compositementioning

confidence: 99%

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Nanostructured Nickel on Porous Carbon-Silica Matrix as an Efficient Electrocatalytic Material for a Non-Enzymatic Glucose Sensor

et al. 2018

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Nanostructured nickel on porous carbon-silica matrix (N-CS) has been synthesized using a sol gel process and subsequent pyrolysis treatment at a temperature of 650 °C. The morphology and microstructure of the N-CS sample has been investigated using XRD (X-ray Diffraction), SEM-EDS (Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy), and BET (Brunauer-Emmett-Teller) analysis. The synthesized nanocomposite has been used for developing NCS-modified screen-printed electrodes (NCS-SPCEs) and was applied in the electrochemical monitoring of glucose. After electrochemical activation, via cycling the modified electrode in a potential window from 0 to 0.8 V in 0.1 M KOH solution, the fabricated NCS-SPCEs electrodes were evaluated for the voltammetric and amperometric determination of glucose. The developed sensors showed good sensing performance towards glucose, displaying a sensitivity of 585 µA/mM cm−1 in the linear range from 0.05 to 1.5 mM, a detection limit lower than 30 µM with excellent selectivity.

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MBE Grown Vanadium Oxide Thin Films for Enhanced Non‐Enzymatic Glucose Sensing

Franceschini

Payo

Schouteden

et al. 2023

Adv Funct Materials

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In the search for non‐enzymatic alternatives to glucose oxidase, reliable and microchip‐compatible approaches to catalyst development are highly desirable. Herein, the electrochemical behavior of thin films of VOx deposited by molecular beam epitaxy (MBE) on glassy carbon electrodes is reported . A process of partial etching during polarization is observed. Thereafter, highly active and stable traces of VOx act as catalytic centers for glucose electrooxidation. A mechanistic description of the electrochemical process is proposed based on evidence provided by voltammetric measurements. The sensors are calibrated both with potentiometric and amperometric techniques, the former showing a wide linear range (1–10 mM), good sensitivity (14.93 ± 0.39 µA cm−2 × mM–1) and a limit of detection (0.32 m‐M). Unlike most metal oxides, it is shown that VOx on glassy carbon is capable of successfully oxidizing glucose at −0.4 V. Such a one‐of‐kind behavior can have important ramifications for energy‐efficient integrated electrochemical sensors and non‐enzymatic glucose sensing as a whole.

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Non‐enzymatic Glucose Sensor Based on Nickel/Carbon Composite

Cited by 51 publications

References 49 publications

Tuning the NiO Thin Film Morphology on Carbon Nanotubes by Atomic Layer Deposition for Enzyme‐Free Glucose Sensing

Tuning the NiO Thin Film Morphology on Carbon Nanotubes by Atomic Layer Deposition for Enzyme‐Free Glucose Sensing

Nanostructured Nickel on Porous Carbon-Silica Matrix as an Efficient Electrocatalytic Material for a Non-Enzymatic Glucose Sensor

MBE Grown Vanadium Oxide Thin Films for Enhanced Non‐Enzymatic Glucose Sensing

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