Back to Search
Start Over
Defect-Dependent Surface Phase Transformation on 1T-TiS2Assisted by Water
- Source :
- The Journal of Physical Chemistry - Part C; February 2023, Vol. 127 Issue: 7 p3462-3469, 8p
- Publication Year :
- 2023
-
Abstract
- The phase transformation from the TiS2to TiS on the surface of bulk 1T-TiS2crystals is achieved by thermal vacuum annealing. This is demonstrated by a combination of photoemission spectroscopy, electron paramagnetic resonance spectroscopy, and Raman spectroscopy. The chemical interaction between TiS2and surface-adsorbed H2O molecules is expected to assist this transformation. Especially, the transformation temperature is found to depend on the natural defects present in the TiS2crystals. Ti interstitial (Tii) and S vacancy (Sv) defects hinder TiS2to TiS transformation, whereas Ti-OH species facilitate the phase transformation. These results not only provide a valuable insight into the water-assisted phase transformation modulated by defects but also highlight a potential strategy for designing an unusual TiS2-TiS heterostructure through a combination of phase and defect engineering.
Details
- Language :
- English
- ISSN :
- 19327447 and 19327455
- Volume :
- 127
- Issue :
- 7
- Database :
- Supplemental Index
- Journal :
- The Journal of Physical Chemistry - Part C
- Publication Type :
- Periodical
- Accession number :
- ejs62192062
- Full Text :
- https://doi.org/10.1021/acs.jpcc.2c08140