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Fullerenes, Nanotubes and Carbon Nanostructures Volume 21, 2013 - Issue 7
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Original Articles

Thermal Properties, Raman Spectroscopy and Tem Images of Neutron-Bombarded Graphite

Franco Cataldo Istituto Nazionale di Astrofisica – Osservatorio, Astrofisico di Catania, Catania, Italy; Lupi Chemical Research, Rome, Italy; Tor Vergata University, Department of Chemistry, Rome, ItalyCorrespondence[email protected]
,
Ornella Ursini Institute of Chemical Methodologies, CNR, Rome, Italy
,
Giorgio Nasillo Dipartimento di Chimica “S. Cannizzaro,”, Università degli Studi di Palermo, Palermo, Italy; Centro Grandi Apparecchiature-UniNetLab, Università degli Studi di Palermo, Palermo, Italy
,
Eugenio Caponetti Dipartimento di Chimica “S. Cannizzaro,”, Università degli Studi di Palermo, Palermo, Italy; Centro Grandi Apparecchiature-UniNetLab, Università degli Studi di Palermo, Palermo, Italy
,
Marilena Carbone Dipartimento di Chimica “S. Cannizzaro,”, Università degli Studi di Palermo, Palermo, Italy
,
Federica Valentini Dipartimento di Chimica “S. Cannizzaro,”, Università degli Studi di Palermo, Palermo, Italy
,
Giuseppe Palleschi Dipartimento di Chimica “S. Cannizzaro,”, Università degli Studi di Palermo, Palermo, Italy
&
Tibor Braun Institute of Chemistry, L. Eotvos University, Budapest, Hungary
 show all
Pages 634-643 | Published online: 02 Jan 2013
 
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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.

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