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• W4387190980 endingPage "115717" @default.
• W4387190980 startingPage "115717" @default.
• W4387190980 abstract "The increasing demand for vitamin D status assessment has highlighted the need for rapid, sensitive, and user-friendly methods for its detection in biological samples potentially integrated in Point-of-Care (PoC) diagnostic devices. Detection of the major circulating form of vitamin D, 25-hydroxyvitamin D3-25(OH)D3, is particularly challenging due to the laborious procedures for sample preparation and its low molecular weight (∼400 Da), which requires highly sensitive detection methods. In this study, we developed a novel label-free Lab-on-Fiber biosensing platform for highly sensitive detection of 25(OH)D3 based on the integration of plasmonic metasurfaces (MSs) on the tip of a single-mode optical fiber (OF). A dedicated pipeline was carefully designed and developed to optimize the bio-functionalization of the plasmonic sensor tip to specifically detect the target biomolecule. The resulting MS-assisted Lab-on-fiber platform enables direct and highly sensitive detection of 25(OH)D3 in clinically relevant ranges (4–160 ng/mL), both in buffer solution and complex matrix, with limits of detection (LOD) of 1.40 ng/mL in saline buffer and 0.85 ng/mL in complex matrix. Overall, these results demonstrate that our platform can successfully and specifically detect small molecules in label-free configuration, with performances comparable to those of conventional methods used in clinical practice. The high degree of miniaturization combined with its high sensitivity make our platform an exceptional building block for realizing valid diagnostic alternatives for label-free detection of clinically relevant analytes, which can be transformed into new low-cost, fast, simple, and ready-to-use PoC diagnostic devices with improved processability and performance compared to current methods." @default.
• W4387190980 created "2023-09-30" @default.
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• W4387190980 date "2023-12-01" @default.
• W4387190980 modified "2023-10-09" @default.
• W4387190980 title "Metasurface-assisted Lab-on-fiber optrode for highly sensitive detection of vitamin D" @default.
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• W4387190980 doi "https://doi.org/10.1016/j.bios.2023.115717" @default.
• W4387190980 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37801838" @default.
• W4387190980 hasPublicationYear "2023" @default.
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