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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
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Growth of Fe-BDC Metal-Organic Frameworks onto Functionalized Si (111) Surfaces
Hongye Yuan1,2, Weichu Fu1, Nadia Soulmi1,3
1Laboratoire de Physique de la Matière Condensée, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France.
Chemistry, an Asian Journal
|April 26, 2022
Summary
Researchers directly grew iron(III) metal-organic framework (MOF) layers on silicon surfaces. Different crystalline phases formed, with varying surface coverage and adhesion, paving the way for MOF device integration.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Integrating metal-organic frameworks (MOFs) into devices requires their direct growth on solid surfaces.
- Functionalized silicon surfaces offer a versatile platform for MOF synthesis.
Purpose of the Study:
- To report the direct growth of iron(III) benzene dicarboxylate MOFs onto functionalized silicon surfaces.
- To investigate the formation of different crystalline phases and their surface characteristics.
Main Methods:
- Direct MOF growth on functionalized silicon.
- X-Ray Diffraction (XRD) for crystallographic analysis.
- High-resolution atomic force microscopy (AFM) for surface morphology.
Main Results:
- Successfully grew three distinct MOF phases: cubic MIL-101(Fe), hexagonal (similar to MOF-235), and monoclinic MIL-53(Fe).
- Observed co-nucleation and growth, with phase coverage dependent on surface chemistry and solution composition.
- Demonstrated oriented growth of 3D crystallites and formation of 2D MIL-101(Fe) nanocrystallites with (111) texture.
- Identified weak adhesion for the hexagonal phase, suggesting different surface anchoring mechanisms.
Conclusions:
- Direct MOF growth on silicon is feasible, yielding diverse crystalline phases.
- Surface chemistry and solution composition control MOF phase formation and coverage.
- Understanding phase-specific adhesion is crucial for device integration and fabrication.
