Details of Grant 

EPSRC Reference:	GR/R83057/01
Title:	Scanned-Energy Mode Photoelectron Diffraction for Absorbate Structure Determination on Metals and Oxides
Principal Investigator:	Woodruff, Professor DP
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Physics
Organisation:	University of Warwick
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 2002	Ends:	31 October 2005	Value (£):	236,479
EPSRC Research Topic Classifications:	Surfaces & Interfaces
EPSRC Industrial Sector Classifications:	Chemicals No relevance to Underpinning Sectors
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Panel History:
Summary on Grant Application Form
The object of this study is to extend the method of scanned-energy mode photoelectron diffraction, developed by the applicant in a Warwick-Berlin collaboration, to the solution of increasingly relevant and challenging model surface adsorption systems, exploiting the enhanced spectral resolution and associated chemical-state specific structural information from undulator sources of synchrontron radiation at BESSY II and the NSLS. One new direction is to determine the structure of simple molecular adsorbates on oxide surfaces, notably NiO and MgO; our first such recent studies have exposed major failings of current theoretical descriptions of some of these systems, but only with quantitative experimental structural data can such theories be seriously challenged. It is also proposed to tackle the problem of the local structure of adsorbates at surface defect sites, a problem of great potential chemical significance; this will be done through the use of vicinal metal surfaces and oxide surfaces on which differences in the photoelectron binding energy are associated with different local sites. A similar approach will be used to elucidate some classic but ill-understood problems in multiple site occupation of single species on singular metal surfaces. Using a variable polarisation undulator it is also planned to explore novel polarisation geometries to tackle the problem of determining surface structures on the weakly electron-backscattering surfaces of Pt.
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Organisation Website:	http://www.warwick.ac.uk