Fig. 2

a Size (DLS) and TEM of blank cPRP, b GNA002@cPRP, and c GNA002@RP nanoparticles. Scale bar: 500 nm (100 nm inset). d Zeta potentials of the blank cPRP, GNA002@cPRP, and GNA002@RP nanoparticles. e Size changes in GNA002@cPRP in PBS (pH 7.4 and 5.0) and serum over 48 h. f The release profiles of GNA002@cPRP nanoparticles in PBS (pH 7.4, 6.8 and 5.0), containing 0.1% Tween 80, at 37 ℃