Mxene as an excellent barrier material for Ga-induced corrosion

Ga-based liquid metal (LM) suffers from severe corrosiveness toward chips and heatsink metals, posing a major obstacle to its practical use. Herein, we propose MXene films as barrier layers to mitigate Ga-induced corrosion. Combining first-principles density functional theory and experimental analyses, anti-corrosion performance and reliability were systematically evaluated. MXene nanosheets were found to self-assemble on Cu surfaces via van der Waals interactions, providing an interfacial adhesion force of 17.23 mN. The coatings effectively inhibit Ga corrosion while maintaining high thermal conductivity and long-term stability. This strategy offers a simple and efficient solution to corrosion issues in Ga-based TIM applications.