UNSPECIFIED (1994) ADSORBATE STRUCTURE DETERMINATION ON SURFACES USING PHOTOELECTRON DIFFRACTION. [Journal Item]

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Abstract

Photoelectron diffraction is the name given to the phenomenon resulting from the coherent interference of the directly emitted component of an electron wavefield, emerging from an atom as a result of core level photoemission, with other components elastically scattered by surrounding atoms. Experimental characterization of this effect provides information which can be used to provide quantitative determinations of the structure of surfaces, and particularly of adsorbed species on surfaces, in an element-specific fashion. Since the initial demonstration of the phenomenon in the late 1970s, an extensive methodology for surface structure determination has been developed. In this review the background physics of the process, and the development of the technique is described. A brief discussion of the high energy forward scattering version of the technique (x-ray Photoelectron Diffraction-XPD), which utilizes zero-order diffraction effects, is included, but the most of the review is concerned with the lower energy backscattering method more relevant to the determination of detailed adsorption sites on surfaces. In addition to the general theoretical, experimental and methodology background, a number of the more recent developments are described including use of 'direct inversion' methods for (approximate) structure determination, including a survey of photoelectron holography, and the realization of chemical shift photoelectron diffraction to allow structure determinations of surfaces including atoms of one element in more than one inequivalent site. All of the developments are illustrated with specific examples, mainly of molecular and atomic adsorbates on metal surfaces.

Item Type:	Journal Item
Subjects:	Q Science > QC Physics
Journal or Publication Title:	REPORTS ON PROGRESS IN PHYSICS
Publisher:	IOP PUBLISHING LTD
ISSN:	0034-4885
Date:	October 1994
Volume:	57
Number:	10
Number of Pages:	52
Page Range:	pp. 1029-1080
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/20226

Data sourced from Thomson Reuters' Web of Knowledge

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