Symposium NM05: Structural Control and Design of 2D Layered Materials and Heterostructures Toward Novel Functionalities
December 07, 2024
Masaki Yamamoto, Murata Manufacturing Co., Ltd.
Synthesis and Characterization of Amino-Functionalized Ti3C2 MXene with Extremely High Conductivity
Written by Andrew M. Fitzgerald
Masaki Yamamoto from Murata Manufacturing Co., Ltd. developed a highly conductive amino-functionalized Ti3C2 MXene with a record-breaking conductivity of approximately 4,000 S/cm. This a significant advancement in research being done on the surface chemistry of MXenes, which are a family of 2D transition metal carbides, nitrides, and carbonitrides that have found use in many different electronic applications. MXenes are important because their properties can be “tuned” by making slight changes to their chemical composition. Researchers have found that modifying their surfaces could allow for a more precise ability to do so. Amino-functionalization, in particular, offers benefits such as enhanced oxidation resistance, improved dispersibility in organic solvents, and new reactive sites for biomolecules, polymers, and other organic molecules. However, traditional methods using silane coupling agents (SCAs) face challenges, including self-polymerization that reduces the material's conductivity. Yamamoto overcame these limitations by introducing amino groups using phosphonic acid as a ligand. The resulting material has exceptional electrical properties. This breakthrough opens new possibilities for MXenes in high-performance applications, including energy storage, sensors, and electronic devices, where maintaining high conductivity is crucial to good performance. Future work aims to explore additional factors contributing to the material’s enhanced conductivity and further optimize MXene surface modifications.
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