Nano-Raman Spectroscopy Figure of Merit and Chemical Analysis of Contaminations in Single-Layer MoSe₂.

ABSTRACT: Contaminations in the formation of two-dimensional heterostructures can hinder or generate the desired properties. Recent advancements have highlighted the potential of tip-enhanced Raman spectroscopy (TERS) for studying materials in the 2D semiconductor class. In this work, we investigate the influence of 50-200 nm sized nanoprotuberances within a monolayer of MoSe₂ using nano-Raman spectroscopy, establishing correlations between the presence of localized contaminations and the observed hyperspectral variations. A figure of merit is established for the identification of surface impurities, based on the MoSe₂ peaks ratio resulting from TERS field coherence. New spectral peaks are also identified, which are associated with the presence of nanoprotuberances and indicate

SUBMITTER: Guimaraes JE 

PROVIDER: S-EPMC12530041 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature