Fig. 4From: Isolation of exosomes from whole blood by a new microfluidic device: proof of concept application in the diagnosis and monitoring of pancreatic cancerCharacterization of antibody coupling. a Nanodrop measurements of the NPs-CD9 complexes at different NP/antibody weight ratios. b AFM images of the Fe3O4NPs, of CD9 antibody and of Fe3O4–EDC-NHS-NPs:anti-CD9Back to article page