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Evidence for a solid phase of dodecahedral C-20
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2003 (English)In: European Physical Journal B: Condensed Matter Physics, ISSN 1434-6028, E-ISSN 1434-6036, Vol. 31, no 4, 509-515 p.Article in journal (Refereed) Published
Abstract [en]

Evidence is presented for the formation of a solid phase based on the smallest fullerene, C-20, in thin diamond-like carbon films deposited by ultraviolet laser ablation from diamond onto nickel substrates at room temperature in the presence of 10(-4) torr of cyclohexane or benzene. Laser desorption mass spectrometry from the films shows the presence of C-20, C-21 and C-22 species, while micro-Raman spectroscopy and electron diffraction from selected particles together with first principle density-functional calculations, indicate a cubic solid with dodecahedral C-20 Cages as building blocks. Unlike solid C-60 and fully protonated C-20, which are bound by van der Waals forces, the proposed structure is stabilized by linking of the C-20 dodecahedra with bridging carbon atoms at interstitial tetrahedral sites to form a face-centered-cubic lattice with 22 carbon atoms per unit cell.

Place, publisher, year, edition, pages
2003. Vol. 31, no 4, 509-515 p.
Keyword [en]
smallest fullerene, gas-phase, carbon, superconductivity, raman, c-60, c-36
Identifiers
URN: urn:nbn:se:kth:diva-22420DOI: 10.1140/epjb/e2003-00060-4ISI: 000182209400009OAI: oai:DiVA.org:kth-22420DiVA: diva2:341118
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Rao, K. V.Muhammed, Mamoun
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