Nanoporous designer solids with huge lattice constant gradients: Multiheteroepitaxy of metal-organic frameworks

Zhengbang Wang, Jinxuan Liu, Binit Lukose, Zhigang Gu, Peter G. Weidler, Hartmut Gliemann, Thomas Heine, Christof Wöll

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

We demonstrate the realization of hierarchically organized MOF (metal-organic framework) multilayer systems with pronounced differences in the size of the nanoscale pores. Unusually large values for the lattice constant mismatch at the MOF-MOF heterojunctions are made possible by a particular liquid-phase epitaxy process. The multiheteroepitaxy is demonstrated for the isoreticular SURMOF-2 series [ Liu et al. Sci. Rep. 2012, 2, 921 ] by fabricating trilayer systems with lattice constants of 1.12, 1.34, and 1.55 nm. Despite these large (20%) lattice mismatches, highly crystalline, oriented multilayers were obtained. A thorough theoretical analysis of the MOF-on-MOF heterojunction structure and energetics allows us to identify the two main reasons for this unexpected tolerance of large lattice mismatch: the healing of vacancies with acetate groups and the low elastic constant of MOF materials.

Original languageEnglish
Pages (from-to)1526-1529
Number of pages4
JournalNano letters
Volume14
Issue number3
DOIs
Publication statusPublished - 2014 Mar 12

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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