English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

All carbon materials, e.g., amorphous carbon (a-C) coatings and C60 fullerenethin films, play an important role in short-wavelength free-electron laser(FEL) research motivated by FEL optics development and prospectivenanotechnology applications. Responses of a-C and C60 layers to the extremeultraviolet (SPring-8 Compact SASE Source in Japan) and soft x-ray(free-electron laser in Hamburg) free-electron laser radiation are investigatedby Raman spectroscopy, differential interference contrast, and atomic forcemicroscopy. A remarkable difference in the behavior of covalent (a-C) andmolecular (C60) carbonaceous solids is demonstrated under these irradiationconditions. Low thresholds for ablation of a fullerene crystal (estimated to bearound 0.15 eV/atom for C60 vs 0.9 eV/atom for a-C in terms of the absorbeddose) are caused by a low cohesive energy of fullerene crystals. An efficientmechanism of the removal of intact C60 molecules from the irradiated crystaldue to Coulomb repulsion of fullerene-cage cation radicals formed by theionizing radiation is revealed by a detailed modeling.

Contrasting behavior of covalent and molecular carbon allotropes exposed to extreme ultraviolet and soft x-ray free-electron laser radiation