Superparamagnetic Bifunctional Bisphosphonates Nanoparticles: A Potential MRI Contrast Agent for Osteoporosis Therapy and Diagnostic

Figure 1

IR spectra of di-HMBP free molecules (blue curve) and $\gamma {\text{Fe}}_2{\text{O}}_3$@di-HMBP (red curve). Insert: transmission electron microscopy image taken of a nanoparticle solution at pH 7.