Static and dynamic Raman excitation mapping of chirality-pure carbon nanotube films

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Bibliographic Details
Published inCommunications materials Vol. 6; no. 1; pp. 10 - 9
Main Authors Finnie, Paul, Ouyang, Jianying, Fagan, Jeffrey A
Format Journal Article
LanguageEnglish
Published London Nature 12.01.2025
Nature Publishing Group UK
Nature Publishing Group
Nature Portfolio
Subjects
639/301/357/73
639/301/930/527/1821
639/624/1107/527/1821
639/925/357/73
639/925/930/527/1821
Band spectra
Banded structure
Carbon
Chemistry and Materials Science
Chirality
Defects
Electron states
Excitation spectra
Mapping
Material properties
Materials Science
Nanomaterials
Raman spectra
Raman spectroscopy
Resonance
Single wall carbon nanotubes
Spectrum analysis
Vibration mode
Wavelengths
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Summary:Les films supplémentaires 1-5 sont disponibles sur le site de l'éditeur.
NRC publication: Yes
Raman spectroscopy is a powerful method for probing electronic and vibrational properties of materials, particularly nanomaterials such as single-wall carbon nanotubes. Typically, Raman spectroscopy is conducted at a single, or few, excitation wavelengths, but that provides limited information about excitation resonance structure, and their dynamical evolution. Here, we extend a sensitive full-spectrum technique to rapidly obtain two-dimensional Raman excitation maps both statically and dynamically for chirality-pure single-wall carbon nanotube films. We demonstrate sensitive evaluation of structured resonance profiles even from weak vibrational modes, and sub-second time resolution of the dynamics of photo-driven defect production. Findings include the direct observation of bands and their profiles – including bands which could be missed in conventional Raman spectroscopy - and demonstration of differences for odd vs. even defect band combinations. This opens up possibilities to investigate the coupling of electronic states with vibrational modes in nanomaterials and track their dynamical evolution subject to intentional modulation.
Supplementary Movie 1-5 are available on the publisher's site
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ISSN:2662-4443
2662-4443
DOI:10.1038/s43246-024-00727-6