Raman spectroscopy of 2D MoS<sub>2</sub> on Ti<sub>3</sub>C<sub>2</sub> MXene: the substrate effect
We use Raman spectroscopy to study the substrate effect of Ti<sub>3</sub>C<sub>2</sub> MXene on the lattice vibrational modes of MoS<sub>2</sub>. We observed redshifts in the fingerprint peaks of MoS<sub>2</sub>, and explained the shifts based on their vibrational nature. The shift in the in-plane E<sup>1</sup> <sub>2g</sub> mode is attributed to the strain effect, and the softened A<sub>1g</sub> mode associated with the out-of-plane vibration is caused by electron doping. In addition to monolayer MoS<sub>2</sub>, we show that the modulation from Ti<sub>3</sub>C<sub>2</sub> MXene is also present in few-layer and bulk MoS<sub>2</sub>. Furthermore, we demonstrate that the laser-induced shift occurs even at low excitation power. Our results indicate that a detailed power-dependent measurement is indispensable for extracting the pure substrate effect from Raman spectroscopy.
Authors
- Xin Lu (ORCID: https://orcid.org/0000-0002-9992-2077)
- Michael Naguib (ORCID: https://orcid.org/0000-0002-4952-9023)
- Martin Busse (ORCID: https://orcid.org/0000-0002-1794-4636)
- Ahmad Majed (ORCID: https://orcid.org/0000-0002-5642-4158)
- Elham Loni (ORCID: https://orcid.org/0000-0002-2281-4553)
- Ali Reza Soleymani (ORCID: https://orcid.org/0000-0003-2888-0284)
- Wang Fei (ORCID: https://orcid.org/0000-0002-8275-0256)
- Qiaohui Zhou
- Edward Pollack
- Kenneth Agbakansi
Institutions
- Tulane University (US)
Publication Details
- Journal
- Nanoscale Advances
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5na00096c
- Citations
- 3
- Primary Topic
- MXene and MAX Phase Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.55
Funders
- National Science Foundation
- Tulane University
- American Chemical Society Petroleum Research Fund
- Division of Materials Research