Fig. 2

Cross-sectional view and selected area electron diffraction (SAED). The (a–d) and (f–i) present the SAED pattern at different locations on the skeleton of the P-SC anatase Ti38O75 crystal. The e presents the cross-sectional view of the P-SC anatase Ti38O75 crystal while the locations for SAED pattern are labeled. The porous single-crystalline (P-SC) anatase Ti38O75 crystal is grown along with the a-axis of KTP substrate. The scale bar is 5 1/nm in (a–d) and (f–i). The scale bar is 1 μm in (e)