Formation of organic color centers in air-suspended carbon nanotubes using vapor-phase reaction

Organic color centers in single-walled carbon nanotubes have demonstrated exceptional ability to generate single photons at room temperature in the telecom range. Combining the color centers with pristine air-suspended nanotubes would be desirable for improved performance, but all current synthetic...

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Bibliographic Details
Published in:Nature communications 2022-05, Vol.13 (1), p.2814-2814, Article 2814
Main Authors: Kozawa, Daichi, Wu, Xiaojian, Ishii, Akihiro, Fortner, Jacob, Otsuka, Keigo, Xiang, Rong, Inoue, Taiki, Maruyama, Shigeo, Wang, YuHuang, Kato, Yuichiro K.
Format: Article
Language:English
Subjects:
639/301/357/73
639/624/399/73
639/925/357/73
Air temperature
Carbon
Chemical reactions
Color
Color centers
Diameters
Emissions
Emitters
Excitons
Humanities and Social Sciences
Light sources
multidisciplinary
Nanotechnology
Nanotubes
Photochemical reactions
Photochemicals
Photoluminescence
Photons
Room temperature
Science
Science (multidisciplinary)
Single wall carbon nanotubes
Spectroscopy
Telecommunications
Vapors
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Summary:Organic color centers in single-walled carbon nanotubes have demonstrated exceptional ability to generate single photons at room temperature in the telecom range. Combining the color centers with pristine air-suspended nanotubes would be desirable for improved performance, but all current synthetic methods occur in solution which makes them incompatible. Here we demonstrate the formation of color centers in air-suspended nanotubes using a vapor-phase reaction. Functionalization is directly verified by photoluminescence spectroscopy, with unambiguous statistics from more than a few thousand individual nanotubes. The color centers show strong diameter-dependent emission, which can be explained with a model for chemical reactivity considering strain along the tube curvature. We also estimate the defect density by comparing the experiments with simulations based on a one-dimensional exciton diffusion equation. Our results highlight the influence of the nanotube structure on vapor-phase reactivity and emission properties, providing guidelines for the development of high-performance near-infrared quantum light sources. Organic color centers in single-walled carbon nanotubes can act as single-photon sources in the telecom range. Here the authors report the functionalization of air-suspended nanotubes through a vapor-phase photochemical reaction, demonstrating a further tailoring of quantum emitter materials.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-022-30508-z