Oxidation Studies of the Graphite Surface by Scanning Tunneling Microscopy and Photoelectron Spectroscopy

• Authors: Z. Klusek , M. Phaner , P. Krapf , L. Porte
• Languages of publication: EN

Abstracts

EN

Scanning tunneling microscopy and spectroscopy and X-ray photoelectron spectroscopy were used to study oxidation effects of nitric acid on highly oriented pyrolytic graphite surface. This treatment was performed at different temperatures and etching times with the aim of realizing local binding sites on the surface without creating deep defects. Then these three technics were found in good agreement to characterize the weakly oxidized surface. A wavy structure different from pure graphite at atomic scale was imaged by scanning tunneling microscopy. This modification was correlated to the presence of carboxylic groups on the surface revealed by X-ray photoelectron spectroscopy. Both spectroscopies of scanning tunneling and X-ray photoelectron demonstrated the vanishing of π bands characteristic from sp^{2} graphitic hybridization. This was attributed to dehybridization corresponding to new bondings of the graphite carbons in the carboxylic groups.

Keywords

EN

61.16.Ch; 33.60.Fy

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1994
• Volume: 86
• Issue: 6
• Pages: 947-954

Dates

published

1994-12

received

1994-07-05

Contributors

author

Z. Klusek

• Ecole Centrale de Lyon, B.P. 163, 69131 Ecully Cx, France

author

M. Phaner

• Ecole Centrale de Lyon, B.P. 163, 69131 Ecully Cx, France

author

P. Krapf

• Ecole Centrale de Lyon, B.P. 163, 69131 Ecully Cx, France

author

L. Porte

• Ecole Centrale de Lyon, B.P. 163, 69131 Ecully Cx, France