Study of the oxidation of W(110) by full-solid-angle photoelectron diffraction with chemical state and time resolution

Technical Report · Tue Apr 01 00:00:00 EST 1997

DOI:https://doi.org/10.2172/603677· OSTI ID:603677

Ynzunza, R. X. ^[1]; Palomares, F. J. ^[2]; Tober, E. D. ^[1]; Wang, Z. ^[1]; Morais, J. ^[3]; Denecke, R. ^[1]; Daimon, H. ^[4]; Chen, Y. ^[3]; Hussain, Z ^[3]; Liesengang, J. ^[5]; Van Hove, M. A.; Fadley, C. S. ^[1]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics; ICMM-CSIC, Madrid (Spain)
3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Osaka Univ. (Japan). Dept. of Materials Physics
5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); La Trobe Univ., Bundoora (Australia)

The brightness of third-generation synchrotron radiation from beamline 9.3.2 at the Advanced Light Source has been combined with the high-intensities and energy resolutions possible with its advanced photoelectron spectrometer/diffractometer experimental station in order to study the time dependence of the oxidation of the W(110) surface. This has been done via chemical-state-resolved core-level photoelectron spectroscopy and diffraction. This system has been studied previously by other methods such as LEED and STM, but several questions remain as to the basic kinetics of oxidation and the precise adsorption structures involved. By studying the decay and growth with time of various peaks in the W 4f{sub 7/2} photoelectron spectra, it should be possible to draw quantitative conclusions concerning the reaction kinetics involved. The authors have also measured full-solid-angle photoelectron diffraction patterns for the two oxygen-induced W states, and these should permit fully defining the different structures involved in this oxidation process.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 603677
• Report Number(s): LBNL-39981; ON: DE97007345; CNN: Contract N00014-94-1-0162
• Resource Relation: Related Information: Is Part Of Advanced light source: Compendium of user abstracts 1993--1996, 622 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
TUNGSTEN
MONOCRYSTALS
SURFACE PROPERTIES
OXIDATION
ELECTRON DIFFRACTION
PHOTOELECTRON SPECTROSCOPY
TIME DEPENDENCE
CHEMICAL REACTION KINETICS