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Direct Optical Patterning of Metal-Organic Frameworks via Photoacid-Induced Etching
Zhaohui Zhu1,2,3, Fu Li1,2, Jinwen Li1,2,3
1State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
ACS Nano
|July 11, 2024
Summary
We demonstrate using the acid-labile nature of metal-organic frameworks (MOFs) for direct optical patterning. This method leverages controllable acid release to alter MOF solubility, enabling pattern formation without contamination.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Metal-organic frameworks (MOFs) are porous materials built from organic linkers and metal nodes.
- The inherent bonding in some MOFs can lead to instability under harsh conditions.
- Material instability can be harnessed for novel applications.
Purpose of the Study:
- To demonstrate direct optical patterning of MOFs using their acid-labile properties.
- To develop a contamination-free patterning method for MOFs.
- To explore the application of patterned MOFs in devices.
Main Methods:
- Utilizing the acidic lability of MOFs for solubility changes.
- Employing a photoacid generator for localized acid release upon light exposure.
- Developing patterns through selective bond cleavage and subsequent development.
Main Results:
- Successful direct optical patterning of MOFs was achieved.
- The process avoided extra steps and contamination common in traditional photolithography.
- Patterned MOFs retained their porosity and crystallinity.
Conclusions:
- Acidic lability of MOFs is a viable property for direct optical patterning.
- This technique offers a cleaner and more efficient method for MOF fabrication.
- Preserved MOF properties enable applications in gas sensors and solid displays.
