Research Article

Bifunctional Silica-Coated Superparamagnetic FePt Nanoparticles for Fluorescence/MR Dual Imaging

Table 1

Longitudinal and transverse relaxivities and relaxivity ratios of FePt and FePt@SiO2-FITC nanoparticles.

Material 𝑟 1 (s−1mM−1) 𝑟 2 (s−1mM−1) 𝑟 2 / 𝑟 1

FePt5.7396.169.5
FePt@SiO2-FITC6.8102.315.0