Crystalline, Highly Oriented MOF Thin Film: the Fabrication and Application

Abstract

The thin film of metal-organic frameworks (MOFs) is a rapidly developing research area which has tremendous potential applications in many fields. One of the major challenges in this area is to fabricate MOF thin film with good crystallinity, high orientation and well-controlled thickness. In order to address this challenge, different appealing approaches have been studied intensively. Among various oriented MOF films, many efforts have also been devoted to developing novel properties and broad applications, such as in gas separator, thermoelectric, storage medium and photovoltaics. As a result, there has been a large demand for fundamental studies that can provide guidance and experimental data for further applications. In this account, we intend to present an overview of current synthetic methods for fabricating oriented crystalline MOF thin film and bring some updated applications. We give our perspective on the background, preparation and applications that led to the developments in this area and discuss the opportunities and challenges of using crystalline, highly oriented MOF thin film.

The Tuning of Optical Properties of Nanoscale MOFs-Based Thin Film through Post-Modification

“…One piece of the optical thin film was cut into four equal slices using a diamond cutter. Then, the slices were put into a tubular furnace at 330 °C for 6 h before post-modification [ 27 ]. Three of the equal slices were immersed in a toluene solution of C3, C5, or C7 (0.1 M) at 90 °C for 12 h for post-modification.…”

“…Optical properties, which determine the application of optical devices in different fields, are the most significant properties of optical thin films. Recently, MOF-based thin films, in particular, optical thin films, have attract more and more attention, since they can potentially be used as active components (which can be easily regulated) in functional devices [ 22 , 23 , 24 , 25 , 26 , 27 ]. This is in contrast to the difficulty of tailoring the optical properties of conventional dense inorganic optical films.…”

Infrared crystallography for framework and linker orientation in metal–organic framework films

“…[9][10][11] While MOFs are available in a great variety of shapes, such as nanocrystals, nanospheres, or hierarchical monoliths, MOF thin lms hold tremendous potential to translate the structural properties of individual crystals to continuous, scalable materials. Scalability and processability are essential for the application of MOFs in numerous elds 12,13 such as optics, 9 photonics, 2 catalytic coatings, sensing, solar cells or for batteries. 14 The majority of these applications rely on the precise crystallographic orientation and uniform porosity of the MOF to allow for e.g.…”

Heterogeneous growth of continuous ZIF-8 films on low-temperature amorphous silicon

“…Metal Organic Frameworks (MOF) are becoming more and more promising for a wide range of technologies [1][2][3][4][5][6]. Similar to coordination polymers, MOF are hybrid porous complexes in which periodic arrangements of metal clusters are connected by organic ligands [7]. They have a flexible crystalline structure with tunable pore sizes, large surface area, chemical stability, and low density [8,9].…”