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Points quantiques attachés à l’oxyde de graphène pour la détection sensible de l’acide ascorbique en solution aqueuse.

Des points quantiques (QD) CdSe-ZnS fluorescents solubles dans l’eau ont été immobilisés sur de l’oxyde de graphène (GO) et utilisés pour la détection sensible de l’acide ascorbique dans des solutions aqueuses. Les QD ont été fixés à la surface de l'oxyde de graphène en utilisant la réaction de couplage EDC / NHS-sulfo. L'acide ascorbique est connu comme un antioxydant. Il joue un rôle crucial dans le maintien de la santé, les voies bio-synthétiques telles que la formation de collagène et la régulation du système immunitaire. L'intensité de la photoluminescence (PL) des hybrides GO-QD préparés dans l'eau a été désactivée par de l'acide ascorbique à la température ambiante. Sur la base de ce phénomène d’extinction par photoluminescence, une procédure simple, rapide et sensible est développée. Dans cette étude, nous détectons avec succès l’acide ascorbique en raison de son importance biologique et la limite de détection est de 568pM.


Source: https://www.ncbi.nlm.nih.gov/pubmed/30184800


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