Development of Drug Loaded Nanoparticles Binding to Hydroxyapatite Based on a Bisphosphonate Modified Nonionic Surfactant

Figure 4

The short-term stability of the three nanoparticles at 4°C for 7 days. (a) Pa-SNPs; (b) Pa-NEMs; (c) Pa-PNPs.

(a)

(b)

(c)