Time sequential measurement of the precursor state of oxygen on the titanium surface by means of time-of-flight spectroscopy for electron stimulated desorption

An adsorption process of oxygen on the titanium single-crystal surface of (101̄0) has been investigated by means of a time-of-flight spectrometer for the electron stimulated desorption (ESD). An oxidation experiment has been performed at the oxygen pressure ranging from 1 to 8×10 -8 Torr. TOF spectr...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1989-12, Vol.28 (12), p.2594-2596
Main Authors: UEDA, K, TAKANO, A
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
General and physical chemistry
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Solid-gas interface
Specific materials
Surface physical chemistry
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Summary:An adsorption process of oxygen on the titanium single-crystal surface of (101̄0) has been investigated by means of a time-of-flight spectrometer for the electron stimulated desorption (ESD). An oxidation experiment has been performed at the oxygen pressure ranging from 1 to 8×10 -8 Torr. TOF spectra of ESD signals were obtained sequentially by a digital acquisition system. In an initial adsorption stage, the O + ESD signal intensity grew depending on the oxygen exposure. The O + signal peaks have the most probable kinetic energies of 3.5±0.4 eV and 1.8±0.2 eV. The higher-energy peak is identified as the ESD signal from molecularly adsorbed oxygen on the surface, and the lower one as that from the chemically adsorbed oxygen.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.28.2594