Surface Termination Dependent Work Function and Electronic Properties of Ti3C2Tx MXene
By T. Schultz, Nathan C Frey, Kanit Hantanasirisakul, Soohyung Park, S. May, V. Shenoy, Yury Gogotsi, N. Koch. Chemistry of Materials, 2019
569 citations recorded by the source corpus.
MXenes, an emerging family of 2D transition metal carbides and nitrides, have shown promise in various applications, such as energy storage, electromagnetic interference shielding, conductive thin films, photonics, and photothermal therapy. Their metallic nature, wide range of optical absorption, and tunable surface chemistry are the key to their success in those applications. The physical properties of MXenes are known to be strongly dependent on their surface terminations. In this study, we investigated the electronic properties of Ti3C2Tx for different surface terminations, as achieved by different annealing temperatures, with the help of photoelectron spectroscopy, inverse photoelectron spectroscopy, and density functional theory calculations. We find that fluorine occupies solely the face-centered cubic adsorption site, whereas oxygen initially occupies at least two different adsorption sites, followed by a rearrangement after fluorine desorption at high annealing temperatures. The measured electroni...
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/2bd2e6b250fd6aa168d4628d2f339194ba48773b
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In Materials Chemistry
- J. Rosen
- Yury Gogotsi
- Armin VahidMohammadi
- Michel W. Barsoum
- V. Mauchamp
- S. Célérier
- P. Chartier
- Cyril Garnero
Citations in the corpus
- The world of two-dimensional carbides and nitrides (MXenes) (2021, background): “The most energetically favorable and thermodynamically stable site for these moieties is on the surface of M2C, M3C2, and M4C3 layers, centered above the transition metal atoms of the atomic plane beneath the outer layer [facecentered cubic (fcc) site] (28, 31).”
- One MAX phase, different MXenes: A guideline to understand the crucial role of etching conditions on Ti3C2Tx surface chemistry (2020, background): “Moreover, as previously mentioned, the F terminal groups are bonded preferentially on the Asites [49,50].”