New atomic-scale features in graphite surfaces treated in a dielectric barrier discharge plasma

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 2008 Spain English Publisher:Elsevier BVJournal:Carbon, volume 46, pages 1,364-1,367 (issn: 0008-6223,

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Authors: Solís Fernández, Pablo; Paredes Nachón, Juan Ignacio; Martínez Alonso, Amelia; Díez Tascón, Juan Manuel;

doi: 10.1016/j.carbon.2008.05.021

handle: 10261/11299

New atomic-scale features in graphite surfaces treated in a dielectric barrier discharge plasma

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Abstract

The effects of an air plasma generated by a dielectric barrier discharge (DBD) on highly oriented pyrolytic graphite (HOPG) have been investigated through scanning tunneling microscopy (STM), Raman and XPS spectroscopies. Three main types of nanometer/atomic scale features were identified by STM: (i) small bumps, attributed to surface atomic vacancies; (ii) smooth bumps, attributed to interstitial Ar or C atoms; and (iii) depressions not previously reported for graphite, and tentatively attributed to interstitial oxygen species. The evolution of the STM features suggests that the surface modification of HOPG by an air DBD plasma is dominated by physical processes (ion bombardment).

P.S.-F. acknowledges receipt of an I3P pre-doctoral Contract from CSIC. Funding of this work by the Spanish MEC through projects CTQ2005-09105-CO4-02 and VEM2004-08576 is gratefully acknowledged. Financial support from CSIC (I3 Project No. 200680I198) is also acknowledged.

4 pages, 3 figures.-- Printed version published Aug 2008.

Peer reviewed

Country

Spain

Related Organizations

Spanish National Research Council
Spain
Instituto Nacional del Carbón
Spain

Keywords

Activated carbon, Oxygen plasma, Oxidation, Scanning-tunneling-microscopy, Pressure, Argon, Oriented pyrolytic-graphite

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