|About this Abstract
||MS&T22: Materials Science & Technology
||Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
||Synthesis of Solid-Solution MXenes with Tunable Electronic, Optical, and Electrochemical Properties
||Christopher Eugene Shuck, Meikang Han, Kathleen Maleski, Yizhou Yang, James Glazar, Alexandre Foucher, Kanit Hantanasirisakul, Asia Sarycheva, Nathan Frey, Steven May, Vivek Shenoy, Eric Stach, Yury Gogotsi
|On-Site Speaker (Planned)
||Christopher Eugene Shuck
MXenes are the largest class of 2D materials discovered so far. With a general formula of Mn+1XnTx, M is an early transition metal, X is C and/or N, Tx represents the surface groups, and n = 1–4, over 30 stoichiometric phases have already been discovered. One understudied class of MXenes are solid-solution, where multiple elements are randomly distributed within the M layers. Herein, three interrelated solid solution systems, (Ti2-yVy)CTx, (Ti2-yNby)CTx, (Nb2-yVy)CTx are used as models to study the optical, electronic, and electrochemical properties. Optically, the MXene systems are tailorable in a nonlinear fashion, with absorption peaks from ultraviolet to near-infrared wavelength. The electrical conductivity of solid solution MXenes can be controllably varied over 6 orders of magnitude from 10 to 300 K. They exhibit tunable properties that are directly related to their chemistry. By understanding this relationship, it then becomes possible to rationally design MXenes designed for specific applications.