MXenes are a family of two-dimensional (2D) inorganic compounds with the general formula of Mn+1XnTx, where M is an early transition metal, X is carbon and/or nitrogen, and T is a functional group on the surface of a MXene (typically O, OH and F) (M. Naguib, et al. Adv. Mater., 2014, 26, 992). MXenes have the high metallic conductivity of transition metal carbides, and are (unlike other 2D materials like graphene) hydrophilic because of their hydroxyl- and oxygen-terminated surfaces. MXenes were first discovered in 2011 at Drexel University, as a result of selectively etching the A layer out of bulk ternary transition metal carbides and nitrides, known as MAX phases, which yields multilayered MXenes. To increase surface area and accessibility of its surface, multilayered MXenes typically undergo further processing to yield solutions of delaminated MXenes.
Due to their hydrophilicity, MXenes can be processed in aqueous and polar organic solvents to form stable colloidal solutions that can be filtered to form freestanding films and spray-coated to form transparent conductive coatings. This provides a greater of potential applications for this family of materials. The first MXene discovered was Ti3C2 and it was initially investigated for its electrochemical properties in batteries and supercapacitors (B. Anasori, et al. Nature Reviews Materials, 2017, 2, 16098). In the past several years, however, over two dozen MXenes have been discovered along with dozens of other applications.
The uniqueness of this Drexel University’s MXene Conference is that it celebrates the scientific discoveries, research innovations, collaboration with industry, and international excellence that has developed since the discovery of MXene at Drexel. The conference will bring together MXene researchers in the areas of energy storage and generation, electromagnetic interference shielding, antennas, transparent conductors, gas and pressure sensors, water purification, gas separation membranes, photo- and electrocatalysis, medicine and plasmonics among many others.