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Alwadai, Norah
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- 2023Ecofriendly green synthesis of Ag@Cu bimetallic nanoparticles using <i>Seidlitzia stocksii</i> stem extract: photocatalytic degradation of methylene bluecitations
- 2023Photocatalytic degradation of atrazine and abamectin using <i>Chenopodium album</i> leaves extract mediated copper oxide nanoparticlescitations
- 2022Thermal Degradation of Poly (Styrene-Co-Methyl Methacrylate) in the Presence of AlI3 Nanoadditivecitations
- 2022Controlled growth of nanocomposite thin layer based on Zn-Doped MgO nanoparticles through Sol-Gel technique for biosensor applicationscitations
- 2017High-Performance Ultraviolet-to-Infrared Broadband Perovskite Photodetectors Achieved via Inter-/Intraband Transitionscitations
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article
Controlled growth of nanocomposite thin layer based on Zn-Doped MgO nanoparticles through Sol-Gel technique for biosensor applications
Abstract
<p>The sol–gel process was used to manufacture zinc-doped magnesium oxide nano-flakes (Zn-MgO nano-flakes), which were then distributed in chitosan solution to create a nanocomposite thin layer over a glassy carbon electrode (GCE). Chitosan acts as a binder that provides strength and prevents the material on GCE from leaching out. Glucose oxidase (GOx or GOD) an enzyme has been immobilized on the fabricated CH-Zn-MgO nanocomposite thin film by using the physical adsorption method to form a CH-Zn-MgO-GOx nano-sensor. The enzyme GO<sub>x</sub> was used to enhance the activity of the nano-sensor by increasing the electron transfer rate. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, and UV–vis spectroscopy were employed to characterize the samples in this study. The morphology of Zn-MgO was flakes-like. EDX analysis showed the presence of Zinc (Zn), Magnesium (Mg), and Oxygen (O). Cyclic voltammetry was performed by depositing Zn-MgO on a glassy carbon electrode. Enzymatic nano-sensors showed a peak current of 1.69 × 10<sup>-5</sup> µA and non-enzymatic nano-sensors showed a peak current of 6.16 × 10<sup>-6</sup> µA at 100 µL/mL glucose concentration. The synthesized nano-sensors were then used for the detection of glucose levels.</p>