Coaxial Core Shell Overgrowth of Zeolite L − Dependence on Original Crystal Growth Mechanism

In this study, the first reported core−shell material combining zeolite L (LTL) and barium-exchanged zeolite L (Ba-LTL) is described. The use of atomic force microscopy to probe the LTL surface growth mechanism was employed to understand the growth pattern of the resultant Ba-LTL coaxial overgrowth layer. Additionally, the dependence of the original crystal surface on the resulting habit of the Ba-LTL core−shell layer is explained. High-resolution scanning electron microscopy (HRSEM) was employed to observe the fine detail of the Ba-LTL layer, and cross-sectional polishing was used to view the boundary between the two crystalline materials.