The structure of negatively curved spongy carbon

  • Benedek G
  • Vahedi-Tafreshi H
  • Barborini E
 et al. 
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Abstract

This work reports on the production and characterization of a novel form of nanostructured carbon consisting of three-dimensional, fully connected sp2networks. This form of carbon is characterized by interconnected thin layers forming a spongy structure with meso- and macroporosity. The spongy carbon is produced by a pulsed microplasma cluster source in the presence of a metal-organic catalyst and it can be deposited as a film by supersonic cluster beam deposition (SCBD). Unlike fullerenes, nanotubes and graphite, which consist of zero-, one- or two-dimensional covalent objects held together by van der Waals' forces, this novel structure consists of a robust, multiply connected graphene sheet which is fully covalent in three dimensions. Theoretical analysis indicates that such carbon sponges apparently grow as minimal surfaces and have the long-sought topological structure of random schwarzites. © 2003 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Nanostructured carbon
  • Schwarzites
  • Spongy carbon
  • Supersonic cluster beams

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