title: Centimetre-scale micropore alignment in oriented polycrystalline metal-organic framework films via heteroepitaxial growth.
abstract: The fabrication of oriented, crystalline films of metal-organic frameworks (MOFs) is a critical step toward their application to advanced technologies such as optics, microelectronics, microfluidics and sensing. However, the direct synthesis of MOF films with controlled crystalline orientation remains a significant challenge. Here we report a one-step approach, carried out under mild conditions, that exploits heteroepitaxial growth for the rapid fabrication of oriented polycrystalline MOF films on the centimetre scale. Our methodology employs crystalline copper hydroxide as a substrate and yields MOF films with oriented pore channels on scales that primarily depend on the dimensions of the substrate. To demonstrate that an anisotropic crystalline morphology can translate to a functional property, we assembled a centimetre-scale MOF film in the presence of a dye and showed that the optical response could be switched 'ON' or 'OFF' by simply rotating the film.
authors.affiliation: Graz University of Technology, Institute of Physical and Theoretical Chemistry, Stremayrgasse 9/Z2, 8010 Graz, Austria.|Future Industries, CSIRO, Private Bag 10, Clayton South, MDC, Victoria 3169, Australia.|International Institute for Nano/Meso Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.|Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia.
authors.forename: Paolo
authors.initials: P
authors.lastname: Falcaro
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.|Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Okada
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Hara
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Ikigaki
authors.affiliation: International Institute for Nano/Meso Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.|Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Tokudome
authors.affiliation: Future Industries, CSIRO, Private Bag 10, Clayton South, MDC, Victoria 3169, Australia.
authors.forename: Aaron W
authors.initials: AW
authors.lastname: Thornton
authors.affiliation: Future Industries, CSIRO, Private Bag 10, Clayton South, MDC, Victoria 3169, Australia.
authors.forename: Anita J
authors.initials: AJ
authors.lastname: Hill
authors.affiliation: Monash Centre for Electron Microscopy, Monash University, Victoria 3800, Australia.
authors.forename: Timothy
authors.initials: T
authors.lastname: Williams
authors.affiliation: Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia.
authors.forename: Christian
authors.initials: C
authors.lastname: Doonan
authors.affiliation: International Institute for Nano/Meso Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.|Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
authors.forename: Masahide
authors.initials: M
authors.lastname: Takahashi
mesh_terms: D016880:Anisotropy; D007287:Inorganic Chemicals / Q000737:chemistry; D000073396:Metal-Organic Frameworks / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D043942:Nanotubes / Q000737:chemistry; D016062:Porosity
chemical_list: D007287:Inorganic Chemicals; D000073396:Metal-Organic Frameworks