Mo2TiC2O2 MXene-based nanoscale pressure sensor


Akkus U. O. , Balci E. , BERBER S.

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, vol.116, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 116
  • Publication Date: 2020
  • Doi Number: 10.1016/j.physe.2019.113762
  • Title of Journal : PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES

Abstract

We 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.