Figure 1

(A) Synthetic illustration of NIR-fluorescent silica coated iron oxide nanoparticles (NF-SIONs). (B) TEM image of synthesized NF-SIONs. (C) Nanoparticle size distribution histogram. (D) Hydrodynamic size distribution of NF-SIONs in 0.01M PBS. (E) Excitation and emission profile of NF-SIONs.