Fig. 2
From: Ratiometric electrochemical OR gate assay for NSCLC-derived exosomes
Characterization of exosome, GNP, and DNA tetrahedron. A Transmission electron microscopic (TEM) image and B nanoparticle flow cytometry (NanoFCM) characterization of exosomes. C TEM image and D dynamic light scattering analysis of gold nanoparticles (GNPs) dispersed in water at room temperature. E Ultraviolet–visible spectroscopy absorption spectra and F Zata potential results of the GNPs and aptamer-functionalized GNPs (GNPs-DNA). G Assembly process of DNA tetrahedrons (T1/T2). H Polyacrylamide gel electrophoresis analysis of T1/T2 (formed by D1/D2, D3, D4 and D5)