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• W3097520033 abstract "Cholecalciferol (Vitamin D3) is an essential fat-soluble vitamin for healthy bone and muscle. Vitamin D deficiency is often not diagnosed as symptoms do not appear for a long time leading to cause osteoporosis, diabetes, and cancer. Currently, the testing of vitamin D is performed in sophisticated large-scale laboratories which are expensive and time-consuming for results. The development of a low-cost assay method could be helpful to detect vitamin D in limited-resource settings. Herein, for the first time, we report a novel electrochemical nanosensor for the analysis of vitamin D3 in biological fluids based on the lanthanum nanoparticles-graphene quantum dots (LaNPs-GQDs) coupled with zeolitic imidazolate framework (ZIF-8) on a glassy carbon electrode (GCE) surface. For the construction of the [email protected] sensing platform we have prepared low toxic graphene quantum dots (GQDs), lanthanum nanoparticles functionalized graphene quantum dots (LaNPs-GQDs), and zeolitic imidazolate frameworks (ZIF-8). The results revealed that the combined impact of all the prepared materials enhanced the catalytic activity of the sensor by increasing the surface area of the sensor, the electron transfer rate between the electrode and vitamin D3 interface, and the facile oxidation of vitamin D3. The morphological and structural characteristics of the prepared [email protected] nanocomposite were investigated by field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–vis spectroscopy (UV–vis), Fourier transform-infrared spectroscopy (FT-IR), and X-ray diffraction technique (XRD). Moreover, the electrochemical properties of the nanocomposite were examined by cyclic voltammetry, electrochemical impedance spectroscopy, chronoamperometry, and square wave voltammetry. Electrochemical studies revealed that an as-prepared sensor exhibited excellent electrochemical response towards vitamin D3 oxidation over a wide linear range from 0.00625 μM to 1.25 μM with an acceptable detection limit of 0.00610μM respectively. Besides, the proposed sensing platform showed an excellent anti-interference nature, reproducibility, acceptable recovery, and reliable stability. Finally, the [email protected]@GCE sensor was successfully applied for the analysis of vitamin D3 in real specimens to show its clinical applicability." @default.
• W3097520033 created "2020-11-09" @default.
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• W3097520033 date "2021-02-01" @default.
• W3097520033 modified "2023-10-17" @default.
• W3097520033 title "Synthesis and characterization of novel lanthanum nanoparticles-graphene quantum dots coupled with zeolitic imidazolate framework and its electrochemical sensing application towards vitamin D3 deficiency" @default.
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• W3097520033 doi "https://doi.org/10.1016/j.colsurfa.2020.125854" @default.
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