Journal article
Orientation-free and differentially pumped addition of a low-flux reactive gas beam to a surface analysis system
Review of scientific instruments, Vol.87(11), pp.113102-113102
11/2016
Handle:
https://hdl.handle.net/2376/116403
PMID: 27910561
Abstract
We describe an example of a piecewise gas chamber that can be customized to incorporate a low flux of gas-phase radicals with an existing surface analysis chamber for in situ and stepwise gas-surface interaction experiments without any constraint in orientation. The piecewise nature of this gas chamber provides complete angular freedom and easy alignment and does not require any modification of the existing surface analysis chamber. In addition, the entire gas-surface system is readily differentially pumped with the surface chamber kept under ultra-high-vacuum during the gas-surface measurements. This new design also allows not only straightforward reconstruction to accommodate the orientation of different surface chambers but also for the addition of other desired features, such as an additional pump to the current configuration. Stepwise interaction between atomic oxygen and a highly ordered pyrolytic graphite surface was chosen to test the effectiveness of this design, and the site-dependent O-atom chemisorption and clustering on the graphite surface were resolved by a scanning tunneling microscope in the nm-scale. X-ray photoelectron spectroscopy was used to further confirm the identity of the chemisorbed species on the graphite surface as oxygen.
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Details
- Title
- Orientation-free and differentially pumped addition of a low-flux reactive gas beam to a surface analysis system
- Creators
- Colin Harthcock - Department of Chemistry and Materials Science & Engineering Program, Washington State University, Pullman, Washington 99164, USAAbdolreza Jahanbekam - Department of Chemistry and Materials Science & Engineering Program, Washington State University, Pullman, Washington 99164, USAJeremy R Eskelsen - Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USADavid Y Lee - Department of Chemistry and Materials Science & Engineering Program, Washington State University, Pullman, Washington 99164, USA
- Publication Details
- Review of scientific instruments, Vol.87(11), pp.113102-113102
- Academic Unit
- Chemistry, Department of
- Publisher
- United States
- Identifiers
- 99900547812401842
- Language
- English
- Resource Type
- Journal article