Thermal properties, raman spectroscopy and tem images of neutron-bombarded graphite

Franco Cataldo, Ornella Ursini, Giorgio Nasillo, Eugenio Caponetti, Marilena Carbone, Federica Valentini, Giuseppe Palleschi, Tibor Braun

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Neutron-irradiated graphite to a total dose of 3.6 × 1016 n cm-2 was studied by DSC, Raman spectroscopy and transmission electron microscopy (TEM). The Wigner energy of neutron-irradiated graphite was 9.5 J/g as measured by DSC; it was released with an exothermal peak at 220°C. The Raman spectroscopy has confirmed the expected effect caused by neutron irradiation of the graphite substrate. The TEM imaging has shown that neutron-irradiated graphite can be effectively exfoliated by sonication in comparison to pristine graphite, which under similar conditions does not exfoliate at all. The interstitial Frenkel defects in neutron-irradiated graphite are intercalated between the graphene layers of the graphite and favor the exfoliation under adequate conditions.

Original languageEnglish
Pages (from-to)634-643
Number of pages10
JournalFullerenes Nanotubes and Carbon Nanostructures
Volume21
Issue number7
DOIs
Publication statusPublished - Jan 1 2013

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Keywords

  • Graphite
  • Raman spectroscopy
  • TEM imaging
  • Wigner energy
  • exfoliation
  • graphene
  • irradiation
  • neutrons

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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