Figure 2

SEM images, N 2 adsorption/desorption isotherms, and pore size distributions of the hybrid microspheres. (A-C) SEM images of the porous γ-Fe2O3/Au/mSiO2 hybrid microspheres with different magnifications. (D) N2 adsorption/desorption isotherms and pore size distributions (the inset figure) of the porous γ-Fe2O3/Au/mSiO2 hybrid microspheres.