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

Abstract

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.

Bulk electronic structure ofK3C60as revealed by soft x-rays

“…filled in the ground state. 3,28 This tendency was, however, implicitly challenged recently, 11 and the resolution of these conflicting views is taken up in Sec. III C.…”

Photoemission study of onionlike carbons produced by annealing nanodiamonds

“…Sufficient quantities could be produced for investigation of their optical, electronic and tribological properties. [14][15][16][17] These carbon onions were characterized by Fourier transform infrared ͑FTIR͒ spectroscopy 16 and it was shown that the most stable state for the onions consists of concentric spheres of fullerenes C n ͑n = 60, 240, …͒. Until now, the electronic properties of the onions were characterized only by spatially resolved EELS in transmission 15,18 and reflection mode.…”

“…[14][15][16][17] These carbon onions were characterized by Fourier transform infrared ͑FTIR͒ spectroscopy 16 and it was shown that the most stable state for the onions consists of concentric spheres of fullerenes C n ͑n = 60, 240, …͒. 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.…”

Momentum- and space-resolved high-resolution electron energy loss spectroscopy of individual single-wall carbon nanotubes

“…In light of the above discussion on the π 2 mode confinement, the π + σ peak might then be expected to be show nondispersive behavior for the (13,7) tube. Indeed, such an effect is observed for C 60 [51] as well as at the tip of a multilayer graphene cone [27]. However, no localization of the π + σ mode along the tube axis is apparent for the (13,7) SWCNT in Figs.…”