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A Raman investigation into the effect of temperature on ion-induced damage of graphite

Theodosiou, Alex, Carley, Albert Frederick and Taylor, Stuart Hamilton 2012. A Raman investigation into the effect of temperature on ion-induced damage of graphite. Journal of Nuclear Materials 426 (1-3) , pp. 26-30. 10.1016/j.jnucmat.2012.03.023

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Abstract

Samples of highly-orientated pyrolytic graphite (HOPG) have been irradiated with 5 keV He+ and Xe+ ions at temperatures of 298 K and 100 K. Irradiation-induced damage has been monitored using Raman spectroscopy through analysis of the intensity of the D-band with respect to the G band (ID/IG ratio). A significant increase in the rate of damage accumulation was observed after ion-irradiation at 100 K, leading to a very broad Raman spectrum. The emergence of a broad feature at ∼1500 cm−1 is also observed and attributed to a significant breakdown of lattice order and the presence of a more amorphous system. This feature is thought to be due to a carbon-ion interaction.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: Elsevier
ISSN: 0022-3115
Last Modified: 04 Jun 2017 03:49
URI: http://orca.cf.ac.uk/id/eprint/27564

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