Preparation and Characterization of a Tumor-Targeting Dual-Image System Based on Iron Oxide Nanoparticles Functionalized with Folic Acid and Rhodamine

Figure 5

(a) UV-Vis spectra of unmodified magnetite, folic acid conjugate, rhodamine conjugate, folic acid/rhodamine magnetite nanoparticles, folic acid solution, and rhodamine solution. (b) Fluorescence emission spectra of magnetite, folic acid conjugate, rhodamine conjugate, folic acid/rhodamine magnetite nanoparticles, folic acid solution, and rhodamine solution.

(a)

(b)