Extended Data Fig. 2: Shapes of ZSM-5 crystals.

a, ADF-STEM image showing the shapes of pristine short-b-axis ZSM-5 crystals. b, ADF-STEM images showing the hollow shapes of etched ZSM-5 crystals (quasi-2D areas are marked with red boxes).

a, ADF-STEM image showing the shapes of pristine short-b-axis ZSM-5 crystals. b, ADF-STEM images showing the hollow shapes of etched ZSM-5 crystals (quasi-2D areas are marked with red boxes).