Terahertz (THz) technology has been used for almost two decades for investigations of nanomaterials, including nanocrystals, nanoparticles, nanowires, nanotubes, or 2D crystals [1]. Very recently, 2D MXenes (transition metal carbides structurally analogous to graphene) have shown remarkable impact in material research due to their metallic conductivity, large specific surface area, charge transport properties, and strong interaction with the THz radiation. Under controlled synthesis conditions, 2D Titanium Carbide MXene (Ti3C2Tx) flakes are prepared from the bulk parent Ti3AlC2 MAX phase by chemical etching [2]. I will discuss in this talk how the THz properties of this MXene strongly depend on nanoscopic charge carrier transport inside the sheets and on the percolation properties of the fabricated structures.
[1] P. Kužel et al., Terahertz spectroscopy of nanomaterials: a close look at charge-carrier transport, Adv. Opt. Matter. 8, 1900623 (2020).
[2] M. Naguib et al., Two-dimensional nanocrystals produced by exfoliation of Ti3AlC2, Adv. Mater. 23, 4248 (2011).
Seminar of Department of Dielectrics