Figure 3From: Preparation of uniform magnetic recoverable catalyst microspheres with hierarchically mesoporous structure by using porous polymer microsphere templateTEM images. (A) The central area (enlarged view of the pink square in B). (B) The inner structure of the ultramicrotomed porous γ-Fe2O3/Au/mSiO2 hybrid microsphere. (C) The edge area (enlarged view of the blue square in B).Back to article page