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Immunoassays on thiol-ene synthetic paper generate a superior fluorescence signal

AuthorsGuo, Weijin; Vilaplana, Lluïsa; Hansson, Jonas; Marco, María Pilar ; Van der Wijngaart, Wouter
Glass slides
Porous substrate
Off-stoichiometric thiol-ene
Issue Date11-May-2020
CitationBiosensors and Bioelectronics 112279 (2020)
AbstractThe fluorescence-based detection of biological complexes on solid substrates is widely used in microarrays and lateral flow tests. Here, we investigate thiol-ene micropillar scaffold sheets (“synthetic paper”) as the solid substrate in such assays. Compared to state-of-the-art glass and nitrocellulose substrates, assays on synthetic paper provide a stronger fluorescence signal, similar or better reproducibility, lower limit of detection (LOD), and the possibility of working with lower immunoreagent concentrations. Using synthetic paper, we detected the antibiotic enrofloxacin in whole milk with a LOD of 1.64 nM, which is on par or better than the values obtained with other common tests, and much lower than the maximum level allowed by European Union regulations. The significance of these results lays in that they indicate that synthetically-derived microstructured substrate materials have the potential to improve the performance of diagnostic assays.
Publisher version (URL)https://doi.org/10.1016/j.bios.2020.112279
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