Nanomaterials, particularly two-dimensional (2D) materials, provide new opportunities for development of future technologies. Two-dimensional transition metal carbides and nitrides (MXenes) are one of the largest and yet quickly growing family of 2D materials. Their unique and diverse electronic, optical, and mechanical and electrochemical properties have already distinguished them from other widely studied 2D materials. MXenes come in a variety of structures, which offer a rich chemistry with more than 50 different compositions already reported. More than a thousand distinct stoichiometries and infinite number of solid solutions are potentially possible. The structure of MXenes can comprise of one or more early transition metals in a random solid solution (such as (Ti,V)2CTx) or ordered (in-plane or out-of-plane, such as Mo2TiC2Tx) form. 1 High-entropy MXenes containing four or five transition metals have also been reported. The surface functional groups of MXenes can be modified, enabling MXenes with metallic behavior and conductivity values over 20,000 S cm-1 , as well as semiconducting or superconducting electronic properties with a range of work functions predicted to be from ~2.6 eV to ~6 eV. The tunable optoelectronic properties of MXenes along with their high mechanical stiffness (Young’s modulus reaching ~0.4 TPa for Nb4C3Tx MXene), tensile strength of 20-30 GPa, rapid ionic transport between the 2D sheets, redox-active surfaces, and biocompatibility have rendered these materials as promising candidates for various emerging technologies such as transparent conductive electrodes, printable antennas, films for electromagnetic interference (EMI) shielding, functional conductive textiles for sensing and energy-storing wearable devices, biomedical devices and biosensors, photovoltaics, and high energy and power density energy storage. However, similar to any new materials and technologies, scalability, competitive cost and killer applications are to be shown in order to unleash their potential and achieve wide commercial use. The scalability of the MXene synthesis process to kilogram quantities has been demonstrated. In EMI shielding MXenes have already outperformed all other materials. Low-cost production process are emerging. In this talk, I aim to discuss MXenes and their unique properties for emerging technologies with the focus on their use as next-generation functional materials. I’ll explain why MXenes may be a game changer in the 2D field and the materials field in general.