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

Jane Elisa Guimarães ; Rafael Nadas ; Rayan Alves ; Wenjin Zhang (National Institute for Materials Science) ; Takahiko Endo ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Riichiro Saito ; Yasumitsu Miyata ORCID (National Institute for Materials Science) ; Bernardo R. A. Neves ; Ado Jorio

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Jane Elisa Guimarães, Rafael Nadas, Rayan Alves, Wenjin Zhang, Takahiko Endo, Kenji Watanabe, Takashi Taniguchi, Riichiro Saito, Yasumitsu Miyata, Bernardo R. A. Neves, Ado Jorio. Nano-Raman Spectroscopy Figure of Merit and Chemical Analysis of Contaminations in Single-Layer MoSe2. ACS Nano. 2025, 19 (40), 35438-35446. https://doi.org/10.1021/acsnano.5c08036

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(abstract)

Contaminations in the formation of two-dimensional heterostructures can hinder or generate desired properties. Recent advancements have highlighted the potential of tipenhanced Raman spectroscopy (TERS) for studying materials in the 2D semiconductor class. In this work, we investigate the influence of 50-200nm sized nanoprotuberances within a monolayer of MoSe2 deposited on hBN 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 contaminations, based on MoSe2 peaks ratio. Notably, new spectral peaks were identified, which are associated with the presence of nanoprotuberances and may indicate contamination, oxidation, or trapped gases within them.

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Keyword: Nano-Raman Spectroscopy MoSe2

Date published: 2025-10-14

Publisher: American Chemical Society (ACS)

Journal:

  • ACS Nano (ISSN: 1936086X) vol. 19 issue. 40 p. 35438-35446

Funding:

  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais APQ - 01860-22
  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais APQ - 04852-23
  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais APQ-01402-23
  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais RED - 00081-23
  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais RED-00079-23
  • Core Research for Evolutional Science and Technology JPMJCR24A5
  • Japan Society for the Promotion of Science JP21H05232
  • Japan Society for the Promotion of Science JP21H05233
  • Japan Society for the Promotion of Science JP21H05234
  • Japan Society for the Promotion of Science JP22H00283
  • Japan Society for the Promotion of Science JP22H04957
  • Japan Society for the Promotion of Science JP23H02052
  • Fusion Oriented REsearch for disruptive Science and Technology JPMJFR213X
  • Ministry of Education (MOE), Taiwan

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

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First published URL: https://doi.org/10.1021/acsnano.5c08036

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Updated at: 2025-12-09 16:30:45 +0900

Published on MDR: 2025-12-09 16:26:06 +0900

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