UNSPECIFIED (1992) LOCAL SITE IDENTIFICATION FOR NO ON NI(111) IN VIBRATIONALLY DISTINCT ADSORPTION STATES. In: 38TH NATIONAL SYMP OF THE AMERICAN VACUUM SOC, NOV 11-15, 1991, SEATTLE, WA.

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Abstract

Vibrational spectroscopy of NO on Ni (111) shows two distinct N-O stretching bands for adsorption on the clean surface at different coverages which have been attributed to tilted and perpendicular bridging species at low and high coverage, respectively, while an even higher vibrational energy seen when NO is coadsorbed with oxygen has been attributed to atop NO. We have investigated the local adsorption geometry of these species with scanned energy mode photoelectron diffraction from the N and O 1s states, a method previously found to be very sensitive to site changes and capable of quantitative site identification. We find essentially identical photoelectron diffraction spectra from all three species, indicating that there are no site changes to within a few hundredths of an Angstrom unit. Moreover, a quantitative 'analysis using double scattering model calculations indicates that in all cases the adsorption site is actually a threefold coordinated hollow and not bridge or atop.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
Publisher:	AMER INST PHYSICS
ISSN:	0734-2101
Date:	July 1992
Volume:	10
Number:	4 Part 3
Number of Pages:	6
Page Range:	pp. 2445-2450
Publication Status:	Published
Title of Event:	38TH NATIONAL SYMP OF THE AMERICAN VACUUM SOC
Location of Event:	SEATTLE, WA
Date(s) of Event:	NOV 11-15, 1991
URI:	http://wrap.warwick.ac.uk/id/eprint/21906

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