High-Throughput Screening of Metal-Organic Frameworks for Macroscale Heteroepitaxial Alignment

Andrew Tarzia, Masahide Takahashi, Paolo Falcaro, Aaron W. Thornton, Christian J. Doonan*, David M. Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The ability to align porous metal-organic frameworks (MOFs) on substrate surfaces on a macroscopic scale is a vital step toward integrating MOFs into functional devices. But macroscale surface alignment of MOF crystals has only been demonstrated in a few cases. To accelerate the materials discovery process, we have developed a high-throughput computational screening algorithm to identify MOFs that are likely to undergo macroscale aligned heterepitaxial growth on a substrate. Screening of thousands of MOF structures by this process can be achieved in a few days on a desktop workstation. The algorithm filters MOFs based on surface chemical compatibility, lattice matching with the substrate, and interfacial bonding. Our method uses a simple new computationally efficient measure of the interfacial energy that considers both bond and defect formation at the interface. Furthermore, we show that this novel descriptor is a better predictor of aligned heteroepitaxial growth than other established interface descriptors, by testing our screening algorithm on a sample set of copper MOFs that have been grown heteroepitaxially on a copper hydroxide surface. Application of the screening process to several MOF databases reveals that the top candidates for aligned growth on copper hydroxide comprise mostly MOFs with rectangular lattice symmetry in the plane of the substrate. This result indicates a substrate-directing effect that could be exploited in targeted synthetic strategies. We also identify that MOFs likely to form aligned heterostructures have broad distributions of in-plane pore sizes and anisotropies. Accordingly, this suggests that aligned MOF thin films with a wide range of properties may be experimentally accessible.

Original languageEnglish
Pages (from-to)40938-40950
Number of pages13
JournalACS Applied Materials & Interfaces
Volume10
Issue number47
DOIs
Publication statusPublished - 28 Nov 2018

Keywords

  • heteroepitaxy
  • high-throughput screening
  • lattice matching
  • metal-organic framework
  • porous material

ASJC Scopus subject areas

  • Materials Science(all)

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