Mo2TiC2O2 MXene-based nanoscale pressure sensor

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

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, cilt.116, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 116
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.physe.2019.113762
  • Dergi Adı: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Anahtar Kelimeler: MXene, NEMS pressure sensor, NEGF, INTRINSIC HALF-METALLICITY, TRANSITION-METAL CARBIDES, TRANSPORT-PROPERTIES, SURFACE FUNCTIONALIZATION, THEORETICAL PREDICTION, ELECTRONIC-STRUCTURES, MATRIX, ORDER
  • Gazi Üniversitesi Adresli: Evet

Özet

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.