Abstract
In place of the widely studied graphene, monolayer or few-layer MoS2 flakes are promising materials for next-generation optoelectronic devices. MoS2 has attracted increasing attention in physics and its applications because of its capacity to undergo indirect-to-direct band gap transition. Raman spectroscopy is a useful and versatile tool to probe the physical properties of pristine and intercalated MoS2. This study investigates for the first time the multiphoton modes of FeCl3- and Zn-intercalated few-layer MoS2 at high frequencies of 1513 and 1732 cm-1 for FeCl3-MoS2 and 1341 and 1604 cm-1 for Zn-MoS2. The substrates interact with MoS2 during intercalation. The Raman peak intensities of the intercalated samples vary with intercalation time while keeping the peak position nearly constant. This finding is interesting and suitable for studying other 2D layered materials.
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