The MXene Series is an important and exciting member of the family of advanced 2-D nanomaterials available from ACS Material. [+] Read more
MXenes are 2-D transition metal carbide and nitride inorganic compounds first discovered in 2011. Under an electron microscope, MXenes look like a fine puff pastry with many flaky layers weakly bonded together. ML-MXenes have many of these layers while FL-MXenes have between one and five layers. MXenes use a standard naming convention, Mn+1XnTx, where M is the transitional metal, X is carbon or nitrogen, and T is the terminating group. MXenes are most often derived when the parent MAX (Mn+1AXn) phase has the A (group -13 or -14 element) etched away. While more than 70 different known MAX phases exist, only about 20 have been successfully converted into MXenes.
As a member of a growing family of exciting 2-D materials that includes graphene, MXenes have a number of interesting properties that distinguish them from their cousins:
Tunable band gap. Changing the surface termination of MXenes allows the band gap to be tuned. For example, bare MXenes make outstanding metallic conductors, while MXenes terminating in OH or F act as semiconductors with small band gaps.
Electronic conductivity. Multilayer MXenes have electronic conductivity similar to or greater than that of multilayer graphene.
Hydrophilic. Unlike graphene, MXenes demonstrate hydrophilic behavior; they can be easily dispersed in aqueous solutions.
Intercalation. MXenes can be intercalated with a number of organic and inorganic molecules and salts, creating new compounds with new potential applications.
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