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Article dans une revue

Tuning of photoluminescence intensity and Fermi level position of individual single-walled carbon nanotubes by molecule confinement

Abstract : Photoluminescence of single-walled carbon nanotubes is monitored at the individual scale by molecule encapsulation into their hollow core. Depending on the electronic character (electron donor or acceptor) of the confined molecule, enhancement or quenching of the photoluminescence intensity is demonstrated. This behavior is assigned to a charge transfer, evidenced by the shift of the Raman G-band, and a correlated Fermi level shift shown by photoemission experiments. Our experimental results are supported by DFT calculations. A consistent picture of the physical interactions taking place in the hybrid systems and their effects on the optical and electronic properties is given. Our results indicate that the electron affinity or ionization potential of the encapsulated molecules and the diameter of the nanotube are relevant parameters to tune the light emission properties of the hybrid systems at the nanoscale.
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https://hal.umontpellier.fr/hal-03426915
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Soumis le : vendredi 12 novembre 2021 - 16:40:15
Dernière modification le : mardi 10 mai 2022 - 18:22:12

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Romain Chambard, Juan Carlos Moreno-López, Patrick Hermet, yuta Sato, Kazu Suenaga, et al.. Tuning of photoluminescence intensity and Fermi level position of individual single-walled carbon nanotubes by molecule confinement. Carbon, 2022, 186, pp.423-430. ⟨10.1016/j.carbon.2021.09.072⟩. ⟨hal-03426915⟩

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