Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

Alvarez, Laurent; Almadori, Y.; Arenal, Raúl; Babaa, R.; Michel, Thierry; Parc, Rozenn Le; Bantignies, J.-L.; Jousselme, Bruno; Palacin, Serge; Hermet, Patrick; Sauvajol, J.L.

doi:10.1021/jp1121678

Cited by 50 publications

(70 citation statements)

References 41 publications

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“…Only a detailed Raman study on 6T encapsulated in SWNTs (6T@SWNTs) is presented below, but the same conclusions can be drawn with βcar@SWNTs and other dyes tested so far. The detailed characterization of the dye@SWNT systems prepared by our method is consistent with results from other groups on 6T@SWNTs [7][8][9][10][11] and βcar@SWNT 12,13 in bulk form and clearly indicates that the dyes have been encapsulated. See supplemental information file for details.…”

Section: Two Main Enhancement Strategies Called Resonant Raman Spectsupporting

confidence: 88%

Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

et al. 2013

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Raman spectroscopy uses visible light to acquire vibrational fingerprints of molecules, thus making it a powerful tool for chemical analysis in a wide range of media. Its potential for optical imaging at high resolution is, however, severely limited by the fact that the Raman effect is weak. Here, we report the discovery of a giant Raman scattering effect from encapsulated and aggregated dye molecules inside single-walled carbon nanotubes (SWNTs). Measurements performed on rod-like dyes, such as α-sexithiophene and βcarotene, assembled inside SWNTs as highly polarizable J-aggregates indicate a resonant Raman cross-section (CS) of ~10-21 cm 2 /sr, which is well above the CS required for detecting individual aggregates at the highest optical resolution. Free from fluorescence background and photobleaching, this giant Raman effect allows the realization of a library of functionalized and biocompatible nanoprobe labels for Raman imaging with robust detection using multispectral analysis.

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Section: Two Main Enhancement Strategies Called Resonant Raman Spectsupporting

confidence: 88%

Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

et al. 2013

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“…An efficient method to overcome those disadvantages consists in combining species with carbon NT to create a new hybrid system. Encapsulation of molecules inside the hollow core of nanotubes is among the best methods to combine the physical properties of both systems without any mechanical or chemical damaging 5–7.…”

Section: Introductionmentioning

confidence: 99%

Charge transfer in conjugated oligomers encapsulated into carbon nanotubes

Almadori

Alvarez

Arenal

et al. 2011

Physica Status Solidi (b)

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International audienceThis study deals with a hybrid system consisting in quaterthiophene derivative encapsulated inside single-walled and multi-walled carbon nanotubes. Investigations of the encapsulation step are performed by transmission electron microscopy. Raman spectroscopy data point out different behaviors depending on the laser excitation energy with respect to the optical absorption of quaterthiophene. At low excitation energy (far from the oligomer resonance window) there is no significant modification of the Raman spectra before and after encapsulation. By contrast, at high excitation energy (close to the oligomer resonance window), Raman spectra exhibit a G-band shift together with an important RBM intensity loss, suggesting a significant charge transfer between the inserted molecule and the host nanotubes. Those results suggest a photo induced process leading to a significant charge transfer

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“…This technique is a very powerful tool to investigate such nanomaterials at (sub-) nanometer scale. [30][31][32][33][34] Structural and chemical properties of bundle of single-walled nanotubes have also been investigated. We have acquired a spectrum-image (SPIM) in the whole area showed in the high angle annular dark field (HAADF) image (Figure 1.b).…”

Section: Resultsmentioning

confidence: 99%

One-Dimensional Molecular Crystal of Phthalocyanine Confined into Single-Walled Carbon Nanotubes

et al. 2015

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International audienceNew one-dimensional (1D) hybrid nanosystems are elaborated withmetalated or metal free phthalocyanine molecules encapsulated into the hollow core ofsingle-walled carbon nanotubes. The X-ray diffraction experiments coupled to simulationallow evidencing the 1D structural organization of the molecules inside the nanotubes. Theangle between the molecule ring and the nanotube axis is close to 32° as determined fromour density functional theory calculations. Confined molecules display Raman spectrahardly altered with respect to the bulk phase, suggesting a rather weak interaction with thetubes. For comparison, noncovalent functionalization at the outer surface of the tube is also investigated. The vibrationalproperties of the molecules functionalized at the outer surface of tubes display important modifications. A significant curvature ofthe phthalocyanine is induced by the interaction with the tube walls, leading to change of the central atom position within themolecular ring, in good agreement with our first-principles calculations

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Charge Transfer Evidence between Carbon Nanotubes and Encapsulated Conjugated Oligomers

Cited by 50 publications

References 41 publications

Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

Charge transfer in conjugated oligomers encapsulated into carbon nanotubes

One-Dimensional Molecular Crystal of Phthalocyanine Confined into Single-Walled Carbon Nanotubes

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