Mo2TiC2O2 MXene–based nanoscale pressure sensor

Publication date: Available online 3 October 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Ünal Özden Akkuş, Erdem Balcı, Savas BerberAbstractWe propose Mo2TiC2O2-based quantum transport device as a pressure sensor. Using non-equilibrium Green’s function technique, we have investigated the current–voltage characteristics of Mo2TiC2O2-based nanodevice under pressure. In a compressed double MXene, the electronic states originating from the two different transition metals are shifted up unequally. Thus, the character of VBM changes drastically after a critical compression. The proposed nanodevice has moderate pressure sensitivity. While the macroscopic Mo2TiC2O2 sensor is usable only for excess pressure detection, the nanodevice can act as a pressure sensor in a wider pressure range. Given the excellent stability of MXenes, Mo2TiC2O2 is a promising sensor material. The same mechanism of pressure-induced unequal level-shifting could be exploited also in other double MXenes that will be synthesized.

Source: Physica E: Low dimensional Systems and Nanostructures - October 4, 2019 Category: Nanotechnology Source Type: research