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New ordered structure of amorphous carbon clusters induced by fullerene-cubane reactions
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2018 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 30, article id 1706916Article in journal (Refereed) Published
Abstract [en]

As a new category of solids, crystalline materials constructed with amorphous building blocks expand the structure categorization of solids, for which designing such new structures and understanding the corresponding formation mechanisms are fundamentally important. Unlike previous reports, new amorphous carbon clusters constructed ordered carbon phases are found here by compressing C8H8/C60 cocrystals, in which the highly energetic cubane (C8H8) exhibits unusual roles as to the structure formation and transformations under pressure. The significant role of C8H8 is to stabilize the boundary interactions of the highly compressed or collapsed C60 clusters which preserves their long‐range ordered arrangement up to 45 GPa. With increasing time at high pressure, the gradual random bonding between C8H8 and carbon clusters, due to “energy release” of highly compressed cubane, leads to the loss of the ability of C8H8 to stabilize the carbon cluster arrangement. Thus a transition from short‐range disorder to long‐range disorder (amorphization) occurs in the formed material. The spontaneous bonding reconstruction most likely results in a 3D network in the material, which can create ring cracks on diamond anvils.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2018. Vol. 30, article id 1706916
Keywords [en]
ordered amorphous carbon clusters, crystalline structure, high pressures, cubanes, fullerenes, X-ray diffraction, Raman scattering, Raman spectroscopy, rotor–stator compounds
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-147645DOI: 10.1002/adma.201706916ISI: 000434034100011Scopus ID: 2-s2.0-85045382980OAI: oai:DiVA.org:umu-147645DiVA, id: diva2:1205156
Available from: 2018-05-11 Created: 2018-05-11 Last updated: 2018-10-01Bibliographically approved

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Sundqvist, Bertil

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