Synthesis of nanographite by laser induced thermal expansion of H2SO4 intercalated graphite lattice

Year: 2014

Authors: Carotenuto G., Longo A., Nicolais L., De Nicola S., Pugliese E., Ciofini M., Locatelli M., Lapucci A., Meucci R.

Autors Affiliation: Institute for Polymers, Composites and Biomaterials – National Research Council, Mostra d’oltremare Pad 20, Viale Kennedy 54, 80125 Naples. Italy;
SPIN – National Research Council, Complesso Universitario Monte Sant’Angelo, Via Cinthia, 80126 Naples. Italy;
National Institute of Optics – National Research Council, Largo E. Fermi 6, 50125 Florence, Italy

Abstract: We have experimentally investigated the expansion mechanism induced by laser irradiation of H2SO4 intercalated graphite. Intercalated graphite materials irradiated by laser allows to study reactions occurring in confined chemical conditions. We find that the laser-assisted reaction process is characterized by a threshold temperature of about 140°C followed by a fast rate of heating which produces a large amount of overheated gases and causes a violent expansion of the graphite crystal. We investigate the morphological changes undergone by irradiated graphite filaments using a combination of thermal and visible imaging technique which allows for the quantitative determination of temporal evolution of the thermal field during the heating stage and exfoliation of the grain


Volume: 1407.6204      Pages from: 1  to: 12

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KeyWords: graphite intercalation compounds; laser heating; thermal expansion; infrared image;