Topic
Fullerene
About: Fullerene is a research topic. Over the lifetime, 12723 publications have been published within this topic receiving 359173 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors observed that nanoparticle aggregates collected by thermophoretic precipitation from natural gas-air and propane-air kitchen stove top flame exhausts and other common fuel-gas combustion sources were observed by transmission electron microscopy to consist of mostly turbostratic carbon spherules, aggregates of crystalline graphite nanoparticles mixed with other fullerene nanoforms; and aggregates, for optimal blue-flame combustion, of various sizes of multiwall carbon nanotubes and other multishell polyhedra.
96 citations
TL;DR: In this article, total energy electronic structure calculations of various fullerenes encapsulated in carbon nanotubes and the electronic structures of resulting carbon peapods are presented. But they do not consider the effect of encapsulation on the electron states.
Abstract: We report total-energy electronic structure calculations that provide energetics of encapsulation of various fullerenes in carbon nanotubes and electronic structures of resulting carbon peapods. We find that the electron states of the peapods depend on the space in the nanotubes and that they reflect electron states of the encapsulated fullerenes. The deep energy position of the lowest unoccupied state of fullerenes as well as hybridization between $\ensuremath{\pi}$ states of the fullerenes and the nearly free-electron states of the nanotubes causes a multicarrier character in the peapods.
96 citations
TL;DR: A discussion on the role of fullerene-like structure in carbon black has been presented in this paper, where it is shown that the electron affinity of these sites should exceed that of C 60 Fullerene, and that the fulleene-like sites should act as free radical acceptor sites where the rubber chain macroradicals formed by chain scission or hydrogen abstraction during mixing could add in competition with other known sites, to form chemical bonds.
96 citations
TL;DR: In this paper, a description of neutral and multiply charged fullerenes is proposed based on a stabilized jellium (structureless pseudopotential) approximation for the ionic background and the local density approximation for sigma and pi valence electrons.
Abstract: A description of neutral and multiply charged fullerenes is proposed based on a stabilized jellium (structureless pseudopotential) approximation for the ionic background and the local density approximation for the sigma and pi valence electrons. A recently developed shell-correction method is used to calculate total energies and properties of both the neutral and multiply charged anionic and cationic fullerenes. The effect of the icosahedral symmetry is included perturbatively. The calculated single-particle energy level spectrum of C_60 is in good correspondence with experimentally measured ones and previous self-consistent local-density-approximation calculations. For the multiply charged fullerenes, we calculate microscopically the charging energies for up to 12 excess charges. A semiclassical interpretation of these results is developed, which views the fullerenes as Coulomb islands possessing a classical capacitance. The calculated values for the first ionization potential and the first electron affinity agree well with the experimental ones. Our calculations support the results from charge transfer bracketing experiments and from direct ionization experiments through electron impact. The doubly charged negative ion is found to be a very long-lived metastable species, in agreement with observations.
96 citations
TL;DR: In this paper, the temperature dependence of the wavelength shift and integrated molar absorptivity of the infrared bands of the C60 and C70 fullerenes was investigated.
Abstract: The detection of C60 and C70 fullerenes in young planetary nebulae and in reflection nebulae suggests that these molecules are more common in certain astrophysical environments than previously thought. The dependence on temperature of the positions and widths of the infrared bands of theC60 and C70 fullerenes isneeded forafirmqualitative detection of thesemolecules in space. Furthermore, the integrated molar absorptivity � (in km mol −1 ) of each infrared absorption band is required for a quantitative determination of the abundance of C60 and C70 in space. In this paper, we report on the temperature dependence of the wavelength shift and integrated molar absorptivity of the infrared bands of the C60 and C70 fullerenes. The measurements have been made in a KBr matrix in the temperature range between −180 ◦ C and +250 ◦ C. The experimental data have been extrapolated to derive both the infrared band shift and the integrated molar absorptivity of the C60 and C70 fullerenes at absolute zero temperature.
96 citations