Recent advances in ZnO nanostructure-based electrochemical sensors and biosensors

Beitollahi, Hadi; Tajik, Somayeh; Nejad, Fariba Garkani; Safaei, Mohadeseh

doi:10.1039/d0tb00569j

Cited by 147 publications

(62 citation statements)

References 183 publications

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“…ZnO has a broad range of applications in photocatalysis [3], photovoltaics [4], gas sensing [5], electronics (diodes), and water-splitting [6]. It has also received growing interest in the field of biochemical sensors [7] thanks to its outstanding sensitivity to chemical species. NPs have a large surface-to-volume ratio.…”

Section: Introductionmentioning

confidence: 99%

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

et al. 2021

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Copper-doped zinc oxide nanoparticles (NPs) CuxZn1−xO (x = 0, 0.01, 0.02, 0.03, and 0.04) were synthesized via a sol-gel process and used as an active electrode material to fabricate a non-enzymatic electrochemical sensor for the detection of glucose. Their structure, composition, and chemical properties were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) and Raman spectroscopies, and zeta potential measurements. The electrochemical characterization of the sensors was studied using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). Cu doping was shown to improve the electrocatalytic activity for the oxidation of glucose, which resulted from the accelerated electron transfer and greatly improved electrochemical conductivity. The experimental conditions for the detection of glucose were optimized: a linear dependence between the glucose concentration and current intensity was established in the range from 1 nM to 100 μM with a limit of detection of 0.7 nM. The proposed sensor exhibited high selectivity for glucose in the presence of various interfering species. The developed sensor was also successfully tested for the detection of glucose in human serum samples.

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Section: Introductionmentioning

confidence: 99%

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

et al. 2021

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“…[8] Frequently,a nnealing improvesthe performance of aT FT,w hich affects both the microstructure of the film and its defect chemistry.S intering causing grain growth and lower porosity is, however,r arely observed in the temperature range (< 500 8C) in question. [9] On the other hand,t hermalt reatments have ad rastic influence on the adsorbates [10] on the surfaceo ft he thin film, as well as on the natureo fp oint defects [11] within the metal oxide lattice. Such effects can be monitored using spectroscopic techniques such as electron paramagnetic resonance (EPR), photoluminescence (PL) spectroscopy,o rX -ray photoelectron spectroscopy (XPS).…”

Section: Introductionmentioning

confidence: 99%

Zinc Oxide Defect Microstructure and Surface Chemistry Derived from Oxidation of Metallic Zinc: Thin‐Film Transistor and Sensor Behavior of ZnO Films and Rods

Hoffmann

Sanctis

Liedke

et al. 2021

Chemistry A European J

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Zinc oxide thin films are fabricated by controlled oxidation of sputtered zinc metal films on ah otplatei na ir at temperatures between 250 and 450 8C. The nanocrystalline films possess high relative densities and showp referential growth in (100) orientation. Integration in thin-filmt ransistors reveals moderate chargec arrierm obilities as high as 0.2 cm 2 V À1 s À1 .T he semiconducting properties depend on the calcination temperature, whereby the best performance is achieved at 450 8C. The defect structure of the thin ZnO film can be trackedb yD oppler-broadening positron annihilation spectroscopy as well as positronlifetimes tudies. Comparablyl ong positron lifetimes suggest interaction of zinc vacancies (V Zn)w ith one or more oxygen vacancies (V O)i n largers tructural entities. Such V O-V Zn defectc lusters act as shallowa cceptors, and thus, reduce the overall electronc onductivity of the film. The concentration of these defectc lusters decreasesa th igherc alcination temperatures as indicated by changes in the Sa nd Wp arameters. Such zinc oxide films obtainedb yc onversiono fm etallic zinc can also be used as seed layers for solution depositiono fz inc oxide nanowires employingamild microwave-assisted process. The functionality of the obtained nanowirea rrays is tested in aU Vs ensor device. The best resultsw ith respect to sensors ensitivity are achieved with thinner seed layers for devicec onstruction.

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“…ZnO2 on its own found prominent use in the rubber industry for promoting cross-linking in carboxylated nitrile rubber and other elastomers and also as an antiseptic additive [23,24] . The most common method of synthesis of ZnO2 is by adding a soluble zinc salt to hydrogen peroxide, while it has also been prepared by hydrothermal or organometallic routes [9,10]. Therefore, it is of considerable interest to follow the decomposition pathway of ZnO2 producing ZnO at various temperatures.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the process of formation of ZnO from ZnO₂ using in situ combined XRD/XAS technique

Daley

Opuni

Dent

et al. 2021

J. Phys.: Condens. Matter

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Use of in situ combined X-ray diffraction and X-ray absorption spectroscopy for the study of the thermal decomposition of zinc peroxide to zinc oxide is reported here. Comparison of data extracted from both X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) with thermo gravimetric analysis (TGA) enabled us to follow the nature of the conversion of ZnO2 to ZnO. A temperature range between 230 and 350 o C appears to show that a very poorly crystalline ZnO is formed prior to the formation of an ordered ZnO material. Both the decrease in white line intensity in the Zn K-edge XANES and resulting lower coordination numbers estimated from analysis of the Zn K-edge data of ZnO heated at 500 o C, in comparison to bulk ZnO, suggest that the ZnO produced by this method has significant defects in the system.

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Recent advances in ZnO nanostructure-based electrochemical sensors and biosensors

Abstract: Nanostructured metal oxides such as zinc oxide (ZnO) are considered as excellent material for fabrication of highly sensitive and selective electrochemical sensors and biosensors due to good properties.

Cited by 147 publications

References 183 publications

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

Zinc Oxide Defect Microstructure and Surface Chemistry Derived from Oxidation of Metallic Zinc: Thin‐Film Transistor and Sensor Behavior of ZnO Films and Rods

Monitoring the process of formation of ZnO from ZnO₂ using in situ combined XRD/XAS technique

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Recent advances in ZnO nanostructure-based electrochemical sensors and biosensors

Abstract: Nanostructured metal oxides such as zinc oxide (ZnO) are considered as excellent material for fabrication of highly sensitive and selective electrochemical sensors and biosensors due to good properties.

Cited by 147 publications

References 183 publications

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

Cu-Doped ZnO Nanoparticles for Non-Enzymatic Glucose Sensing

Zinc Oxide Defect Microstructure and Surface Chemistry Derived from Oxidation of Metallic Zinc: Thin‐Film Transistor and Sensor Behavior of ZnO Films and Rods

Monitoring the process of formation of ZnO from ZnO2 using in situ combined XRD/XAS technique

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Monitoring the process of formation of ZnO from ZnO₂ using in situ combined XRD/XAS technique