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Description:

Tip-enhanced Raman spectroscopy (TERS) combined with principal component analysis (PCA) offers a robust approach for enhancing signal quality and uncovering spectroscopic features otherwise concealed by noise. This study demonstrates that integrating TERS with PCA in large-scale datasets effectively reduces noise and enhances the extraction of weak Raman signals that are often obscured by random spectral fluctuations. The methodology was applied to hyperspectral datasets acquired from MoSe2 monolayers exhibiting nanoscale surface features. Through this approach, previously hidden nano-Raman peaks were successfully isolated, enabling reliable chemical identification at the nanoscale. The combined use of TERS and PCA significantly improves sensitivity and resolution in the spectroscopic analysis of two-dimensional materials, advancing their characterization with respect to interfacial and environmental effects.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: tip-enhanced Raman spectroscopy, MoSe2

Date published: 2025-07-29

Publisher: Wiley

Journal:

• physica status solidi (b) (ISSN: 03701972) vol. 263 issue. 1 e202500291

Funding:

• Japan Science and Technology Agency JPMJFR213X, JPMJCR24A5
• JSPS JP21H05232, JP21H05233, JP21H05234, JP22H00283, JP22H04957, and JP23H02052

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/pssb.202500291

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Updated at: 2026-06-09 13:19:29 +0900

Published on MDR: 2026-06-09 15:25:52 +0900