Figure 2From: Aptamer-modified magnetic nanoprobe for molecular MR imaging of VEGFR2 on angiogenic vasculatureSynthesis of Apt-MNC. (a) FTIR spectrum of polysorbate 80 (black line) and tri-carboxyl polysorbate 80 (blue line). (b) TEM image of Apt-MNC (inset: size distribution histogram). (c) Hydrodynamic diameter (bar) and zeta potential (line scatter) of carboxylated MNC and Apt-MNC.Back to article page