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Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy

[Image: see text] The covalent functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent quantum defects enables their application as near-infrared single-photon sources, as optical sensors, and for in vivo tissue imaging. Tuning the emission wavelength and defect density is cruc...

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Autores principales: Sebastian, Finn L., Becker, Felicitas, Yomogida, Yohei, Hosokawa, Yuuya, Settele, Simon, Lindenthal, Sebastian, Yanagi, Kazuhiro, Zaumseil, Jana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10655237/
https://www.ncbi.nlm.nih.gov/pubmed/37856164
http://dx.doi.org/10.1021/acsnano.3c07668
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author Sebastian, Finn L.
Becker, Felicitas
Yomogida, Yohei
Hosokawa, Yuuya
Settele, Simon
Lindenthal, Sebastian
Yanagi, Kazuhiro
Zaumseil, Jana
author_facet Sebastian, Finn L.
Becker, Felicitas
Yomogida, Yohei
Hosokawa, Yuuya
Settele, Simon
Lindenthal, Sebastian
Yanagi, Kazuhiro
Zaumseil, Jana
author_sort Sebastian, Finn L.
collection PubMed
description [Image: see text] The covalent functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent quantum defects enables their application as near-infrared single-photon sources, as optical sensors, and for in vivo tissue imaging. Tuning the emission wavelength and defect density is crucial for these applications. While the former can be controlled by different synthetic protocols and is easily measured, defect densities are still determined as relative rather than absolute values, limiting the comparability between different nanotube batches and chiralities. Here, we present an absolute and unified quantification metric for the defect density in SWCNT samples based on Raman spectroscopy. It is applicable to a range of small-diameter semiconducting nanotubes and for arbitrary laser wavelengths. We observe a clear inverse correlation of the D/G(+) ratio increase with nanotube diameter, indicating that curvature effects contribute significantly to the defect activation of Raman modes. Correlation of intermediate frequency modes with defect densities further corroborates their activation by defects and provides additional quantitative metrics for the characterization of functionalized SWCNTs.
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spelling pubmed-106552372023-11-17 Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy Sebastian, Finn L. Becker, Felicitas Yomogida, Yohei Hosokawa, Yuuya Settele, Simon Lindenthal, Sebastian Yanagi, Kazuhiro Zaumseil, Jana ACS Nano [Image: see text] The covalent functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent quantum defects enables their application as near-infrared single-photon sources, as optical sensors, and for in vivo tissue imaging. Tuning the emission wavelength and defect density is crucial for these applications. While the former can be controlled by different synthetic protocols and is easily measured, defect densities are still determined as relative rather than absolute values, limiting the comparability between different nanotube batches and chiralities. Here, we present an absolute and unified quantification metric for the defect density in SWCNT samples based on Raman spectroscopy. It is applicable to a range of small-diameter semiconducting nanotubes and for arbitrary laser wavelengths. We observe a clear inverse correlation of the D/G(+) ratio increase with nanotube diameter, indicating that curvature effects contribute significantly to the defect activation of Raman modes. Correlation of intermediate frequency modes with defect densities further corroborates their activation by defects and provides additional quantitative metrics for the characterization of functionalized SWCNTs. American Chemical Society 2023-10-19 /pmc/articles/PMC10655237/ /pubmed/37856164 http://dx.doi.org/10.1021/acsnano.3c07668 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Sebastian, Finn L.
Becker, Felicitas
Yomogida, Yohei
Hosokawa, Yuuya
Settele, Simon
Lindenthal, Sebastian
Yanagi, Kazuhiro
Zaumseil, Jana
Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title_full Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title_fullStr Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title_full_unstemmed Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title_short Unified Quantification of Quantum Defects in Small-Diameter Single-Walled Carbon Nanotubes by Raman Spectroscopy
title_sort unified quantification of quantum defects in small-diameter single-walled carbon nanotubes by raman spectroscopy
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10655237/
https://www.ncbi.nlm.nih.gov/pubmed/37856164
http://dx.doi.org/10.1021/acsnano.3c07668
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