Adsorption geometry of OH adsorbed at F centers on a NaCl(100) surface
(1996) In Physical Review B - Condensed Matter and Materials Physics 53(19). p.13115-13120- Abstract
The orientation of molecular (Formula presented)O in a bilayer on defect-free NaCl(100) and of chemisorbed OH adsorbed at F centers on the (100) surface of NaCl was investigated using angle-resolved O K edge near-edge x-ray-absorption fine-structure spectroscopy (NEXAFS). High-quality single crystalline thin films of NaCl(100) of about four monolayers thickness were grown on Ge(100). These films were bombarded with 250 eV electrons so that F and F′ centers of a maximum density of about 10% of a monolayer were created. Whereas on the defect-free surface only molecular water is adsorbed, dissociation occurs at the F centers and (Formula presented) is bound. NEXAFS of molecular water shows almost no angular dependence even in the... (More)
The orientation of molecular (Formula presented)O in a bilayer on defect-free NaCl(100) and of chemisorbed OH adsorbed at F centers on the (100) surface of NaCl was investigated using angle-resolved O K edge near-edge x-ray-absorption fine-structure spectroscopy (NEXAFS). High-quality single crystalline thin films of NaCl(100) of about four monolayers thickness were grown on Ge(100). These films were bombarded with 250 eV electrons so that F and F′ centers of a maximum density of about 10% of a monolayer were created. Whereas on the defect-free surface only molecular water is adsorbed, dissociation occurs at the F centers and (Formula presented) is bound. NEXAFS of molecular water shows almost no angular dependence even in the monolayer. This finding is consistent with formation of a hydrogen bonded bilayer of water suggested earlier. The OH species formed at the F centers is found to be inclined with respect to the surface normal by 39°±4°. An adsorption model is proposed.
(Less)
- author
- Malaske, U. ; Pfnür, H. ; Bässler, M. LU ; Weiss, M. and Umbach, E.
- publishing date
- 1996
- type
- Contribution to journal
- publication status
- published
- in
- Physical Review B - Condensed Matter and Materials Physics
- volume
- 53
- issue
- 19
- pages
- 6 pages
- publisher
- American Physical Society
- external identifiers
-
- scopus:0001110525
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.53.13115
- language
- English
- LU publication?
- no
- id
- 2cf02f27-931b-40d3-8dce-dc56820b9f72
- date added to LUP
- 2020-11-02 17:02:09
- date last changed
- 2022-02-01 17:27:06
@article{2cf02f27-931b-40d3-8dce-dc56820b9f72,
abstract = {{<p>The orientation of molecular (Formula presented)O in a bilayer on defect-free NaCl(100) and of chemisorbed OH adsorbed at F centers on the (100) surface of NaCl was investigated using angle-resolved O K edge near-edge x-ray-absorption fine-structure spectroscopy (NEXAFS). High-quality single crystalline thin films of NaCl(100) of about four monolayers thickness were grown on Ge(100). These films were bombarded with 250 eV electrons so that F and F′ centers of a maximum density of about 10% of a monolayer were created. Whereas on the defect-free surface only molecular water is adsorbed, dissociation occurs at the F centers and (Formula presented) is bound. NEXAFS of molecular water shows almost no angular dependence even in the monolayer. This finding is consistent with formation of a hydrogen bonded bilayer of water suggested earlier. The OH species formed at the F centers is found to be inclined with respect to the surface normal by 39°±4°. An adsorption model is proposed.</p>}},
author = {{Malaske, U. and Pfnür, H. and Bässler, M. and Weiss, M. and Umbach, E.}},
issn = {{1098-0121}},
language = {{eng}},
number = {{19}},
pages = {{13115--13120}},
publisher = {{American Physical Society}},
series = {{Physical Review B - Condensed Matter and Materials Physics}},
title = {{Adsorption geometry of OH adsorbed at F centers on a NaCl(100) surface}},
url = {{http://dx.doi.org/10.1103/PhysRevB.53.13115}},
doi = {{10.1103/PhysRevB.53.13115}},
volume = {{53}},
year = {{1996}},
}