Kim Jaehwan, Choi Junsik, Hyun Jinho
Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151-921, Republic of Korea.
Department of Agriculture, Forestry, and Bioresources, Seoul National University, Seoul 08826, Republic of Korea.
ACS Appl Mater Interfaces. 2024 Mar 27;16(12):15617-15631. doi: 10.1021/acsami.4c00779. Epub 2024 Mar 15.
The inkjet printing is a simple method to develop pattern-controlled 2D metal-organic frameworks (MOFs) due to its cost-effectiveness and ease of operation. Despite the sophisticated structures of MOF crystals, the MOF surfaces are easily contaminated by the adsorption of an ink solution, and the printing nozzle can be clogged by the aggregates of MOFs during printing. Unlike the mixture inks of MOFs and a carrier medium, the surface-specific patterning by in situ synthesis provides the film surface with the controlled patterns of an MOF single layer having different morphologies of MOFs without changing the ink cartridges. It enables facile printing due to the low viscosity of inks and escapes the risk of nozzle clogging because MOFs are synthesized at the printed patterns on the substrates. The ion-exchanged cellulose nanofiber (CNF) films form strong coordination with metal ions enhancing the stability of the MOFs on the film surface. It also demonstrates the controlled coverage of the MOFs by the printing pass number and the carboxylate content of CNF and the tunable adsorption of the guest molecules for different loading capacities of the printed patterns.
由于具有成本效益且操作简便，喷墨打印是一种用于制备图案可控二维金属有机框架（MOF）的简单方法。尽管MOF晶体结构复杂，但MOF表面很容易因油墨溶液的吸附而受到污染，并且在打印过程中打印喷嘴可能会被MOF的聚集体堵塞。与MOF和载体介质的混合油墨不同，原位合成的表面特异性图案化在不更换墨盒的情况下为膜表面提供了具有不同MOF形态的MOF单层的可控图案。由于油墨粘度低，它能够实现便捷打印，并且由于MOF是在基板上的打印图案处合成的，从而避免了喷嘴堵塞的风险。离子交换纤维素纳米纤维（CNF）膜与金属离子形成强配位，增强了MOF在膜表面的稳定性。它还展示了通过打印次数和CNF的羧酸盐含量对MOF进行可控覆盖，以及针对不同打印图案负载量对客体分子进行可调吸附。
