Figure 2

Structural characterization of nanoparticles. NaGdF4 dispersed in cyclohexane (A); NaGdF4@CaCO3 (B) and NaGdF4@CaCO3-PEG (C) dispersed in H2O; and NaGdF4@CaCO3-PEG dispersed in PBS (pH 5.0).

Structural characterization of nanoparticles. NaGdF4 dispersed in cyclohexane (A); NaGdF4@CaCO3 (B) and NaGdF4@CaCO3-PEG (C) dispersed in H2O; and NaGdF4@CaCO3-PEG dispersed in PBS (pH 5.0).