4 research outputs found
Superprotonic Conductivity in a Highly Oriented Crystalline Metal–Organic Framework Nanofilm
The
electrical properties of a highly oriented crystalline MOF
nanofilm were studied. This nanofilm has low activation energy and
a proton conductivity that is among the highest value reported for
MOF materials. The study uncovered the reasons for the excellent performance
of this nanofilm and revealed a new pathway for proton transport in
MOF materials; besides the channels inside a MOF, the surface of the
MOF nanocrystal can also dominate proton transport
Facile “Modular Assembly” for Fast Construction of a Highly Oriented Crystalline MOF Nanofilm
The preparation of crystalline, ordered thin films of
metal–organic
frameworks (MOFs) will be a critical process for MOF-based nanodevices
in the future. MOF thin films with perfect orientation and excellent
crystallinity were formed with novel nanosheet-structured components,
Cu–TCPP [TCPP = 5,10,15,20-tetrakisÂ(4-carboxyphenyl)Âporphyrin],
by a new “modular assembly” strategy. The modular assembly
process involves two steps: a “modularization” step
is used to synthesize highly crystalline “modules” with
a nanosized structure that can be conveniently assembled into a thin
film in the following “assembly” step. With this method,
MOF thin films can easily be set up on different substrates at very
high speed with controllable thickness. This new approach also enabled
us to prepare highly oriented crystalline thin films of MOFs that
cannot be prepared in thin-film form by traditional techniques
Facile “Modular Assembly” for Fast Construction of a Highly Oriented Crystalline MOF Nanofilm
The preparation of crystalline, ordered thin films of
metal–organic
frameworks (MOFs) will be a critical process for MOF-based nanodevices
in the future. MOF thin films with perfect orientation and excellent
crystallinity were formed with novel nanosheet-structured components,
Cu–TCPP [TCPP = 5,10,15,20-tetrakisÂ(4-carboxyphenyl)Âporphyrin],
by a new “modular assembly” strategy. The modular assembly
process involves two steps: a “modularization” step
is used to synthesize highly crystalline “modules” with
a nanosized structure that can be conveniently assembled into a thin
film in the following “assembly” step. With this method,
MOF thin films can easily be set up on different substrates at very
high speed with controllable thickness. This new approach also enabled
us to prepare highly oriented crystalline thin films of MOFs that
cannot be prepared in thin-film form by traditional techniques
Fabrication and Structural Characterization of an Ultrathin Film of a Two-Dimensional-Layered Metal–Organic Framework, {Fe(py)<sub>2</sub>[Ni(CN)<sub>4</sub>]} (py = pyridine)
We report the fabrication
and characterization of the first example of a tetracyanonickelate-based
two-dimensional-layered metal–organic framework, {FeÂ(py)<sub>2</sub>NiÂ(CN)<sub>4</sub>} (py = pyridine), thin film. To fabricate
a nanometer-sized thin film, we utilized the layer-by-layer method,
whereby a substrate was alternately soaked in solutions of the structural
components. Surface X-ray studies revealed that the fabricated film
was crystalline with well-controlled growth directions both parallel
and perpendicular to the substrate. In addition, lattice parameter
analysis indicated that the crystal system is found to be close to
higher symmetry by being downsized to a thin film