Raman Spectroscopy of 2D MoS[sub.2] Interacting with Metals

• Published in: Crystals (Basel) Vol. 13; no. 8
• Main Authors: Tumino, Francesco, D’Agosta, Paolo, Russo, Valeria, Li Bassi, Andrea, Casari, Carlo Spartaco
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.08.2023
• Subjects: Semiconductors; Spectrum analysis
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst13081271

The research on molybdenum disulphide (MoS[sub.2]) has progressed remarkably in the last decade, prompted by the increasing interest for this material as a potential candidate in future ultrathin optoelectronic devices. MoS[sub.2] is a layered semiconductor with a gap in the visible region, which can be exfoliated down to the mono-layer form. Since the discovery of the exceptional optoelectronic properties of 2D MoS[sub.2], Raman spectroscopy has been extensively used as a tool to characterize the structure and thickness of MoS[sub.2] films. Recent works on MoS[sub.2]-metal interfaces have shown that Raman spectra are significantly affected by the interaction with metals. However, a complete understanding of how such interaction modifies the MoS[sub.2] vibrational properties is still lacking. Studying this subject with both experimental and theoretical methods will provide fundamental insight into the interface physics of MoS[sub.2]-metal systems, which is crucial for the fabrication of metal contacts and for the development of metal-assisted synthesis methods. This review summarizes the main results concerning Raman spectroscopy studies of heterosystems between MoS[sub.2] and transition metals, providing both a basis and directions for future research.