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Carbon Electron - Europe PMC

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Last Updated: 04 October 2022

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Saturable Absorption of Free-Electron Laser Radiation by Graphite near the Carbon K-Edge.

The interaction of intense light with matter gives rise to competing nonlinear responses that can modify material properties in a rapid fashion. The emergence of intense soft X-ray pulses from free-electron lasers has resulted in the results of SA and TPA in separate experiments, prompting concerns about the possible interference between the two phenomena and relative strength.

Source link: https://europepmc.org/article/MED/36165491


Carbon-oxygen surface formation enhances secondary electron yield in Cu, Ag and Au.

To investigate the role of a surface CO monolayer layer assembly on secondary electron emission from Cu, Ag, and Au materials, first-principles experiments coupled with Monte Carlo simulations are used. The formation of a covalent type bonding between C and O atoms has been confirmed by an analysis of estimated total density of states in Cu, Ag, and Au, as well as partial density of states of C and O. Our predicted results for the secondary electron yield contrast very favorably with experimental results in all three materials, as shown by increase in SEY.

Source link: https://europepmc.org/article/MED/36138077


Dissociative electron attachment dynamics of carbon disulfide and violation of axial recoil approximation near 6 eV resonance.

For the 5 to 11 eV incident electron energy range, the ion yields of the various fragment anions created as a result of dissociative electron attachment to carbon disulfide have been obtained. Two resonances for S ions are recorded around 6. 2 eV and 7. 7 eV, while only one resonance for both the CS and S 2 ions at 6. 2 ev is present in this energy range. The kinetic energy and angular distributions of these fragment negative ions at various incident electron energies around the 6. 2 eV resonance have been extracted from the velocity slice photographs.

Source link: https://europepmc.org/article/MED/36000546


Simultaneous boost of anodic electron transfer and exoelectrogens enrichment by decorating electrospinning carbon nanofibers in microbial fuel cell.

Microbial fuel cell regeneration by microbial metabolism is a promising technology in wastewater recovery aided by microbial metabolism. According to the above, maximum power density in MFC with 14 wt% polyacrylonitrile CNFs was 1. 9 and 2. 7 times higher than carbon black modified MFC and the blank. In the M-CNF14 anode's denser biofilm and more microbial nanowires were present than in other environments. In addition, the redox peak current of c-type cytochrome in M-CNF14 was 1. 7-21 times higher in M-CNF14 than in the blank control, demonstrating the most effective EET performance.

Source link: https://europepmc.org/article/MED/36113652


An exotic 3-center/4-electron carbon-carbon pi long-bond: Is it tangible?

Although sharing the latter's lone pair, two end ligands with a comparatively more electronegative motif than the end ligands are predicted to display unusual combination of three-center/four-electron long-bonding, where bonding/antibonding interactions occur between the two end ligands bypassing the central atom is still more electronegative than the end ligands are expected. Notably, this research, as well as a pi long-bond bond in an isomer of C 8 N, where N is not the central atom, not only successfully predicted pi -type long-bonding in linear and non-linear C n X species but also in the triplet-C 2 O and non-linear C n X species, but also revealed multiple pi long-bonds in linear and non-linear C n X species. However, preliminary results from a comprehensive active space self-consistent field multi-reference scheme used in this study only confirmed antibonding pi long-bond orbital, while the CASSCF's credibility could not be established using the CASSCF.

Source link: https://europepmc.org/article/PPR/PPR544155

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions