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Signalverstärker: Superparamagnetische Partikel‐Antikörper‐Konjugate ermöglichten den Nachweis eines Krebs‐Biomarkers in Serum durch Oberflächenplasmonenresonanz (SPR) in einer beispiellos niedrigen Konzentration von 10 fg mL−1 (ca. 300 aM). Die ultrahohe Empfindlichkeit resultiert aus der zusätzlichen Masse und dem höheren Brechungsindex von Aggregaten 1 μm großer magnetischer Partikel (MPs) auf...
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