Visualizing the {110} surface structure of equilibrium-form ZIF-8 crystals by low-dose Cs-corrected TEM

Xiaocang Han; Wenqian Chen; Rui Su; Yuan Tian; Pan Liu; Pengfei Guan; Min Luo; Jiuhui Han; Xiaoxiao Cao; Ming Pan; Mingwei Chen

doi:10.1039/D1NR03829J

Visualizing the {110} surface structure of equilibrium-form ZIF-8 crystals by low-dose Cs-corrected TEM†

Xiaocang Han,

‡^a Wenqian Chen,

‡^bc Rui Su,‡^de Yuan Tian,^f Pan Liu,

*^ab Pengfei Guan,*^de Min Luo,^b Jiuhui Han,^b Xiaoxiao Cao,^g Ming Pan^g and Mingwei Chen

*^f

Author affiliations

* Corresponding authors

^a State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
E-mail: panliu@sjtu.edu.cn

^b Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

^c School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

^d College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
E-mail: pguan@csrc.ac.cn

^e Beijing Computational Science Research Center, Beijing 100193, China

^f Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
E-mail: mwchen@jhu.edu

^g Gatan, Incorporated, 5794 West Las Positas Boulevard, Pleasanton, CA 94588, USA

Abstract

The properties of zeolitic imidazolate framework (ZIF) crystals highly depend on the structures of the low-energy surfaces, such as {110} of ZIF-8. However, the atomic/molecular configurations of the ZIF-8 {110} surfaces remain debated. In this study, the near-atomic-scale characterization of {110} surfaces of ZIF-8 is conducted by low-dose aberration-corrected transmission electron microscopy (TEM). The real-space images with mitigated surface delocalization by minimized spherical aberration of TEM, together with the solvent corrected surface energy calculations, demonstrate that the {110} surfaces of ZIF-8 crystals with an equilibrium-form rhombic morphology have a zigzag-type termination. This study provides experimental evidence to clarify the debated structure of {110} ZIF-8 surfaces and has important implications in understanding the crystal growth and surface related properties of ZIF-8.

Nanoscale

Visualizing the {110} surface structure of equilibrium-form ZIF-8 crystals by low-dose Cs-corrected TEM†

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Visualizing the {110} surface structure of equilibrium-form ZIF-8 crystals by low-dose Cs-corrected TEM

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