[001]-Oriented heteroepitaxy for fabricating emissive surface mounted metal–organic frameworks

Zhao, Tonghan; Taghizade, Narges; Fischer, Jan C.; Richards, Bryce S.; Howard, Ian A.

doi:10.1039/d4tc00018h

J. Mater. Chem. C

2024

DOI: 10.1039/d4tc00018h

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[001]-Oriented heteroepitaxy for fabricating emissive surface mounted metal–organic frameworks

Tonghan Zhao,

Narges Taghizade,

Jan C. Fischer

et al.

Abstract: Well-oriented growth of surface-anchored metal-organic frameworks (SURMOFs) makes them ideal candidates for optical sensor applications. In this work, SURMOF bilayers and trilayers that exhibit [001] orientation are formed via heteroepitaxial...

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Cited by 3 publications

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Review and Outlooks on Electron Migration and Structural Modulation of Metal–Organic Frameworks for Sustainable Fuel Generation

Jamma,

Pal,

Pal

et al. 2024

Energy Fuels

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Metal−organic frameworks (MOFs) are platform materials for solar energy utilization largely due to their adaptability to be synthetically tuned and their inherent variability. The intricate mechanisms of electron transport are associated with structural changes in MOFs and influence their catalytic performance for fuel production. MOFs have been widely explored to engineer their molecular structure and tune their redox behavior. Presently, it has become pertinent to understand the role of structural features in directing the charge migration ability within the molecular framework. Our review explores the dynamic processes of electron migration through structural modulation within MOFs to enhance sustainable fuel generation. Additionally, we discuss designing heterostructures and challenges for large-scale production and their cost reduction. We have presented insights into strategic modifications in MOF structures that can significantly influence their electronic properties and catalytic efficiency. Key modifications include defect engineering, organic linker functionalization, and heterostructure formation, each aimed at boosting the photocatalytic activity. We also illustrate the strategic use of electron−hole separation to improve the efficiency in photocatalytic processes. This review accentuates the role of MOFs as versatile catalysts to advance renewable energy technologies, offering insights into their role in advancing sustainable fuel generation.

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Review and Outlooks on Electron Migration and Structural Modulation of Metal–Organic Frameworks for Sustainable Fuel Generation

Jamma,

Pal,

Pal

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

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Thin Film Formation Based on a Nanoporous Metal–Organic Framework by Layer-By-Layer Deposition

Fratschko,

Zhao,

Fischer

et al. 2024

ACS Appl. Nano Mater.

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Understanding the structure of thin films is essential for successful applications of metal−organic frameworks (MOFs), such as low k-dielectrics in electronic devices. This study focuses on the thin film formation of the 3D nanoporous MOF Cu 2 (bdc) 2 (dabco). The thin films are prepared by a layer-bylayer technique with varying deposition cycles (1 to 50). Thin film morphologies and crystallographic properties were investigated using atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, and grazing-incidence X-ray diffraction (GIXD). AFM revealed an island growth (Volmer−Weber) with plate-like shaped islands. FTIR and GIXD revealed that Cu 2 (bdc) 2 (dabco) crystals form already during the first preparation cycle. The heights of the islands do not increase linearly with the number of deposition cycles, suggesting multiple growth stages. X-ray diffraction pole figures uncover a uniplanar texture of the Cu 2 (bdc) 2 (dabco) crystals, together with randomly oriented crystallites. The fraction of uniplanar oriented crystals increases with each deposition cycle, reaching a maximum of 75% at ten deposition cycles, simultaneously achieving complete substrate coverage. However, already at five cycles, an additional phase of randomly oriented copper-terephthalate (Cu 2 (bdc)) crystals appeared; this phase reaches a fraction of 22% at the largest film thickness (50 cycles). In summary, a detailed understanding of the thin film formation of an archetypal layer-pillar MOF is presented, elucidating how films grow in terms of their morphology and crystalline properties. Samples prepared by ten cycles show complete coverage of the substrate together with the highest degree of preferred crystal orientation. These results establish a deepened understanding of critical parameters for MOF thin film applications, such as complete substrate coverage and definition of the nanopores relative to the substrate surface.

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Macroscopic alignment of metal–organic framework crystals: recent advances and perspectives on sustainability

Bak,

Hong,

Park

et al. 2025

Green Chem.

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[001]-Oriented heteroepitaxy for fabricating emissive surface mounted metal–organic frameworks

Abstract: Well-oriented growth of surface-anchored metal-organic frameworks (SURMOFs) makes them ideal candidates for optical sensor applications. In this work, SURMOF bilayers and trilayers that exhibit [001] orientation are formed via heteroepitaxial...

Cited by 3 publications

References 58 publications

Review and Outlooks on Electron Migration and Structural Modulation of Metal–Organic Frameworks for Sustainable Fuel Generation

Review and Outlooks on Electron Migration and Structural Modulation of Metal–Organic Frameworks for Sustainable Fuel Generation

Thin Film Formation Based on a Nanoporous Metal–Organic Framework by Layer-By-Layer Deposition

Macroscopic alignment of metal–organic framework crystals: recent advances and perspectives on sustainability

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