Electron-energy-loss spectroscopy of plasmon excitations in concentric-shell fullerenes

Henrard, Luc; Malengreau, F.; Rudolf, Petra; Hevesi, K.; Caudano, R.; Lambin, Ph.; Cabioch́, Th.

doi:10.1103/physrevb.59.5832

Cited by 29 publications

(30 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 However, the strong interaction with the silver substrate complicated the unambiguous identification of the surface and volume plasmons in the highly surface sensitive high-resolution EELS experiments. In the transmission EELS measurements presented here, the total absence of silver in the samples, combined with the negligible surface scattering contribution to the measured loss function, even at low q, 23 means that one arrives at the true, representative volume dielectric properties of concentric-shell fullerenes.…”

Section: Resultsmentioning

confidence: 99%

“…8 The electronic properties of such carbon onions were characterized by spatially resolved electron energy-loss spectroscopy ͑EELS͒ in transmission 5,9,10 and by EELS in reflection. 11 From a comparison of the plasmon positions in transmission EELS and in reflection EELS at different geometries and electron beam energies, additional features were observed in the loss function, and were explained by tangential and radial surface plasmons. In addition simulations using a generalized model based on nonrelativistic local dielectric response theory were used to simulate spatially resolved EELS measurements of individual shells.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electronic structure and optical properties of concentric-shell fullerenes from electron-energy-loss spectroscopy in transmission

et al. 2001

View full text Add to dashboard Cite

Electronic structure and optical properties of concentric-shell fullerenes from electron energy-loss spectroscopy in transmission Pichler, T.; Knupfer, M.; Golden, M.S.; Fink, J.; Cabioc'h, T. Published in:Physical Review B Link to publication Citation for published version (APA):Pichler, T., Knupfer, M., Golden, M. S., Fink, J., & Cabioc'h, T. (2001). Electronic structure and optical properties of concentric-shell fullerenes from electron energy-loss spectroscopy in transmission. Physical Review B, 63, 155415. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 11 May 2018Electronic structure and optical properties of concentric-shell fullerenes from electron-energy-loss spectroscopy in transmission We present momentum-dependent measurements of the loss function of bulk samples of concentric-shell fullerenes using electron-energy-loss spectroscopy in transmission. It is shown that the and ϩ plasmons of these so-called carbon onions exhibit a significant momentum dependence, with a dispersion coefficient of about two-thirds of that of the corresponding plasmons in graphite. The optical properties derived from a Kramers-Kronig analysis are reminiscent of those found for polycrystalline disordered graphite. Furthermore, we find no changes of the electronic properties by alternating the average diameter of these carbon nanoparticles between 4 and 8 nm. Consequently, concentric-shell fullerenes can be regarded as spherical graphitic nanoparticles, whose electronic structure and optical properties, down to a particle size of at least 4 nm, are strongly governed by the band structure of graphite.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electronic structure and optical properties of concentric-shell fullerenes from electron-energy-loss spectroscopy in transmission

et al. 2001

View full text Add to dashboard Cite

show abstract

“…20 Furthermore, perfectly spherical shells were used in the theoretical modeling of the EELS data and the agreement was good. The model of Lucas, et al 23 was shown to be qualitatively adequate for understanding the optical data for multi-shell fullerenes.…”

Section: -10mentioning

confidence: 97%

Modeling anisotropic plasmon excitations in self-assembled fullerenes

et al. 2014

View full text Add to dashboard Cite

The plasmon excitations in Coulomb-coupled spherical two-dimensional electron gases (S2DEGs) reveal an interesting dependence on the displacement vector between the centers of the spheres with respect to the axis of quantization for the angular momentum quantum number L. Specifically, plasmon modes for a bundle of three S2DEGs have been obtained within the random-phase approximation (RPA). The inter-sphere Coulomb interaction matrix elements and their symmetry properties were also investigated in detail. The case of a bundle gives an adequate picture of the way in which the Coulomb interaction depends on the orbital angular momentum quantum number L and its projection M . We concluded that the interaction between the S2DEGs aligned at an angle of 45 o with the axis of quantization is negligible compared to the interaction along and perpendicular to the quantization axis, which are themselves unequal to each other. Consequently, the plasmon excitation frequencies reveal an interesting orientational anisotropic coupling to an external electromagnetic field probing the charge density oscillations. Our result on the spatial correlation may be experimentally observable. In this connection, there have already been some experimental reports pointing to a similar effect in nanoparticles.

show abstract

“…Until now, the electronic properties of the onions were characterized only by spatially resolved EELS in transmission 15,18 and reflection mode. 19 Recently Sano et al [20][21][22] reported the production of several milligrams of carbon onions with diameters ranging from 4 to 36 nm using an arc discharge between two graphite electrodes submerged in water or liquid nitrogen. It has been shown that depending upon synthesis conditions the carbon nanoparticles produced by this method contain carbon onions with a perfect spherical shape along with defective carbon onions and a minimum amount of amorphous carbon and carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%