Disposable urea biosensor based on nanoporous ZnO film fabricated from omissible polymeric substrate

Rahmanian, Reza; Mozaffari, M.; Abedi, Mohammad Reza

doi:10.1016/j.msec.2015.08.004

Cited by 50 publications

(24 citation statements)

References 58 publications

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“…Table compares the response characteristics of the FTO/ZnO–Gr/Urs biosensor with the other reported urea biosensors. The biosensor of the present work clearly shows good linear range, detection limit, sensitivity, and response time with respect to results published in other studies …”

Section: Resultssupporting

confidence: 85%

Spin‐coated ZnO–graphene nanostructure thin film as a promising matrix for urease immobilization of impedimetric urea biosensor

Karimi

Mozaffari

Ebrahimi

2018

J Chinese Chemical Soc

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The fabrication, characterization, and application of a nanostructured zinc oxide/ graphene (ZnO/Gr) transducer were described for the determination of urea concentration. For this purpose, thin films of sol-gel-synthesized ZnO nanostructure and Gr were prepared using the spin coating technique on the conductive fluorinated-tin oxide (FTO) substrate. Appropriate correlations between the spinning parameters and thin film features were established so that an efficient ZnO-Gr thin film was obtained. Field emission scanning electron microscopy (FE-SEM) images prove thin film pores to be an operative biosensing zone for urease (Urs) enzyme immobilization.Step-by-step monitoring of FTO/ZnO-Gr/Urs biosensor fabrication was achieved using electrochemical methods. The impedimetric results of a fabricated FTO/ZnO-Gr/Urs biosensor show high sensitivity for urea detection within 5.0-125.0 mg/dL and a limit of detection of 3.36 mg/dL. K E Y W O R D Simpedimetric assessment, sol gel, spin coating, urea biosensor, ZnO-graphene

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Section: Resultssupporting

confidence: 85%

Spin‐coated ZnO–graphene nanostructure thin film as a promising matrix for urease immobilization of impedimetric urea biosensor

Karimi

Mozaffari

Ebrahimi

2018

J Chinese Chemical Soc

Self Cite

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“…Within its melting point range of 220°C-400°C; the degradation of its amorphous part at ∼300°C, and the intermolecular decomposition at about 385°C were found to occur [14,15]. The crystalline part of PVA decays at 398°C [16,17], and complete decomposition to yield the carbon and hydrocarbons that led to the liberation of CO 2 gas and resulting in pure ZnO phase occurred in the temperature range of 400°C-500°C [17][18][19].…”

Section: Introductionmentioning

confidence: 98%

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

Abebe

Murthy

Zereffa

et al. 2020

Mater. Res. Express

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The poly (vinyl alcohol) (PVA) assisted highly mesoporous Zn-Fe-Mn oxides nanomaterials were synthesized using the sol-gel followed by the self-propagation techniques. The UV-vis spectroscopic technique was used to study the optical properties of the materials. The presence of metal-oxygen bond and deposited OH − /H 2 O species were characterized by FT-IR spectroscopic technique. The porous morphology and elemental analysis were confirmed by the SEM/EDX and further morphological and crystal structure studies were conducted using TEM/HRTEM techniques. The semi-crystallinity and composition analyses were verified from XRD patterns. Using the BET N 2 adsorption-desorption analytical techniques; the porosity, specific surface area, and pore diameter enhancements were confirmed. The optima of PVA and precursors percentage were selected with the help of XRD, UV-Vis, and SEM techniques. The potential of the materials towards antibacterial activities was evaluated against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. The 50(0.7) PVA assisted ternary metal oxide nanocomposite (PVA-TMONC) with 125 μg ml −1 concentration showed better inhibition zone for both Escherichia coli and Staphylococcus aureus bacteria, with a value of 28 and 29 mm in diameter, respectively.

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“…The preparation of ceramic NPs is a hot topic, and several methods have been reported for this purpose . ZnO as a semiconductor ceramic finds several applications in light emission, biosensors, and solar cells Therefore, several methods have been developed to enhance their properties and performance . Green chemistry is one of the new methods that is utilized for the preparation of ZnO NPs.…”

Section: Introductionmentioning

confidence: 99%

Water‐based synthesis of ZnO nanoparticles via decomposition of a ternary zinc complex containing Schiff‐base, chelating, and Phen ligands

Gharagozlou

Naghibi

Ataei

2018

J Chinese Chemical Soc

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The recent environmental awareness has been the motivation for the growing preference for environmentally friendly and water‐based systems in chemical synthesis. In the present work, ZnO nanoparticles were synthesized via a novel method without any water‐insoluble compounds. At the first step, a binary Zn Schiff‐base complex was prepared from sodium salicylaldehyde‐5‐sulfonate, L‐alanine, and zinc acetate. Then, a ternary Zn complex containing the Schiff‐base, chelating, and Phen ligands was synthesized from the as‐synthesized binary Zn Schiff base and 1,10‐phenanthroline monohydrate. This intermediate product showed high water solubility and long‐term stability. Finally, ZnO nanoparticles were synthesized through the calcination of the ternary complex powder at 400, 500, and 600 °C. Combining X‐ray diffraction (XRD) and energy dispersive spectroscopy (EDS) results, it was concluded that the samples contained the ZnO phase without any impurity phases, but Fourier transform infrared (FTIR) spectra implied the presence of a remaining impurity. According to the XRD, FTIR, and photoluminescence (PL) analyses, the as‐synthesized samples differed in terms of the defect content and lattice strain. The sample calcined at 500 °C possessed the lowest defect content and lattice strain. Transmission electron microscopy (TEM) imaging revealed the formation of ZnO nanoparticles with particles sizes of <20, ~50, and ~100 nm for samples heat‐treated at the different temperatures.

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Disposable urea biosensor based on nanoporous ZnO film fabricated from omissible polymeric substrate

Cited by 50 publications

References 58 publications

Spin‐coated ZnO–graphene nanostructure thin film as a promising matrix for urease immobilization of impedimetric urea biosensor

Spin‐coated ZnO–graphene nanostructure thin film as a promising matrix for urease immobilization of impedimetric urea biosensor

PVA assisted ZnO based mesoporous ternary metal oxides nanomaterials: synthesis, optimization, and evaluation of antibacterial activity

Water‐based synthesis of ZnO nanoparticles via decomposition of a ternary zinc complex containing Schiff‐base, chelating, and Phen ligands

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