نتایج جستجو برای: fullerenes

تعداد نتایج: 3608  

2013
Imad Ibrahim Yang Zhang Alexey Popov Lothar Dunsch Bernd Büchner Gianaurelio Cuniberti Mark H Rümmeli

All-carbon single-walled carbon nanotubes (SWCNTs) were successfully synthesized, nucleated using a fullerene derivative. A systematic investigation into the initial preparation of C60 fullerenes as growth nucleators for the SWCNTs was conducted. Enhancement in the yield of the produced SWCNT has been achieved with exploring different dispersing media for the fullerenes, the period, and environ...

2014
Xinlin Yang Ali Ebrahimi Jie Li Quanjun Cui

Fullerenes are among the strongest antioxidants and are characterized as "radical sponges." The research on biomedicinal applications of fullerenes has achieved significant progress since the landmark publication by Friedman et al in 1993. Fullerene-biomolecule conjugates have become an important area of research during the past 2 decades. By a thorough literature search, we attempt to update t...

Journal: :Discrete Applied Mathematics 2021

The minimum forcing number of a graph G is the smallest edges simultaneously contained in unique perfect matching G. Zhang et al. (2010) claimed that any fullerene was bounded below by 3. However, we find there exists exactly one exceptional F24 with 2. In this paper, characterize all fullerenes 3 construction approach. This also solves an open problem proposed We except for F24, anti-forcing 4...

2003
WANG Z. C. KANG

Monodispersed nanosize carbon spheres have recently been synthesized using a mixed-valent oxide-catalytic carbonization (MVOCC) process. In this paper, a high surface porosity of carbon spheres produced by an interaction with WO, is reported. The interaction mechanism is due to the reduction of WO, to W driven by an internal Auger decay process under the stimulation of a high-energy electron be...

2000
S. Iglesias-Groth

Multishell fullerenes could be produced in the circumstellar envelopes of rich carbon giants as proposed by Ugarte (1995) and could be carriers of diffuse interstellar bands. Here, we investigate a potential way to detect these molecules through the far infrared bands related to their vibrational spectra. Based on a surface continuum spherical description of the carbon shells, we have derived a...

Journal: :Nature communications 2010
Pawel Utko Raffaello Ferone Ilya V Krive Robert I Shekhter Mats Jonson Marc Monthioux Laure Noé Jesper Nygård

Fullerene peapods, which are carbon nanotubes encapsulating fullerene molecules, can offer enhanced functionality with respect to empty nanotubes. Their prospective applications include, for example, data storage devices, single-electron transistors and spin-qubit arrays for quantum computing. However, the present incomplete understanding of how a nanotube is affected by entrapped fullerenes is...

Journal: :Journal of chromatography. A 2010
Hsiu-Li Su Wan-Chun Kao Cheng-Yu Lee Shih-Ching Chuang You-Zung Hsieh

In this study, nonaqueous capillary electrophoresis (NACE) was used to separate three open-cage fullerenes. Trifluoroacetic acid (TFA) was used as the nonaqueous background electrolyte to change the analytes' mobilities. The selectivity and separation efficiency were critically affected by the nature of the buffer system, the choice of organic solvent, and the concentrations of TFA and sodium a...

Journal: :Experimental dermatology 2009
Anthony Dellinger Zhiguo Zhou Robert Lenk Darren MacFarland Christopher L Kepley

Inflammation is a natural biological response that occurs when vascular tissues are subjected to harmful stimuli. This process may be beneficial to the host during wound healing and infections but can be detrimental if left unchecked. Oxidative stress, the generation of reactive oxygen species, is thought to be one component of this response. Fullerenes can counteract reactive oxygen species du...

2005
Susana Iglesias-Groth

We study the rotation rates and electric dipole emission of hydrogenated icosahedral fullerenes (single and multishell) in various phases of the interstellar medium. Using the formalism of Draine and Lazarian for the rotational dynamics of these molecules in various astrophysical environments, we find effective rotation rates in the range 1–65 GHz with a trend toward lower rotational frequency ...

2012
S. Iglesias-Groth

Theoretical, observational and laboratory work on the new form of carbon known as fullerenes and its hydrogenated forms (fulleranes) are reviewed. These molecules can be responsible of diffuse interstellar bands, the UV bump, a major feature in the extinction curves measured in many lines of sight in our Galaxy and other galaxies and the anomalous microwave emission detected in several regions ...

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