Fig. 4.
Schematic of the operating principles of exo-node-pore sensing (exo-NPS). Extracellular vesicles (EVs) originating from specific cells are captured on colloids coated with antibodies for markers presented on the surface of the target EVs. Binding of EVs increases the effective size of the colloids, which is measured using a two-pore NPS device (exo-NPS)