FARADAY DISCUSSIONS OF THE CHEMICAL SOCIETY NO. 89 1990 Structure of Sufaces and Intefaces as studied using Synchrotron Radiation THE FARADAY DIVISION THE ROYAL SOCIETY OF CHEMISTRY LONDONOrganising Committee Professor J. N. Sherwood (Chairman) Mrs Y. A. Fish Professor D. A. King Dr G. C . King Dr C. Norris Dr R. Oldman Dr C. Thornton ISBN: 0-85186-997- 1 ISSN: 0301-7249 Printed in Great Britain by J. W. Arrowsmith Ltd, BristolA GENERAL DISCUSSION ON S'truct tire of'Stirf&ces and Interfaces us st tidied tising Sinchrotron Radiation 4th, 5th and 6th April, 1990 A General Discussion on Structure of Surfaces and Interfaces as studied using Syn- chrotron Radiation was held at the University of Manchester on 4th, 5th and 6th April, 1990. The President of the Faraday Division, Professor R.H. Ottewill, F.R.S., was in the chair: about 90 members of the Faraday Division and visitors from abroad attended the meeting. Among the visitors were: Prof. 1. Abbati, Italy Mr J-L. Allain, France Dr H. Bach, West Germany Dr N. Barrett, France Prof. A. M. Bradshaw, West Germany Dr G. Comelli, Italy Dr G. Contini, Italy Prof. P. T. Dawson, Canada Dr A. Fontaine, France Dr S. M. Heald, USA Dr J. L. Hogan, USA Dr J. Jupille, France Dr K. Kern, West Germany Prof. D. C. Koningsberger, The Netherlands Mr P. Lambooy, The Netherlands Prof. K. A. R. Mitchell, Canada Dr G. Paolucci, Italy Prof. P. Pershan, USA Dr K. C. Prince, Italy Prof. S. A. Rice, USA Dr A. Robinson, West Germany Dr I. K. Robinson, USA Dr K. M. Robinson, USA Prof. R. Rosei, Italy Dr R.G. van Silfhout, The Netherlands Prof. J. V. Smith, USA Prof. J. F. van der Veen, The NetherlandsA GENERAL DISCUSSION ON S'truct tire of'Stirf&ces and Interfaces us st tidied tising Sinchrotron Radiation 4th, 5th and 6th April, 1990 A General Discussion on Structure of Surfaces and Interfaces as studied using Syn- chrotron Radiation was held at the University of Manchester on 4th, 5th and 6th April, 1990. The President of the Faraday Division, Professor R. H. Ottewill, F.R.S., was in the chair: about 90 members of the Faraday Division and visitors from abroad attended the meeting. Among the visitors were: Prof. 1. Abbati, Italy Mr J-L. Allain, France Dr H. Bach, West Germany Dr N. Barrett, France Prof. A. M. Bradshaw, West Germany Dr G. Comelli, Italy Dr G.Contini, Italy Prof. P. T. Dawson, Canada Dr A. Fontaine, France Dr S. M. Heald, USA Dr J. L. Hogan, USA Dr J. Jupille, France Dr K. Kern, West Germany Prof. D. C. Koningsberger, The Netherlands Mr P. Lambooy, The Netherlands Prof. K. A. R. Mitchell, Canada Dr G. Paolucci, Italy Prof. P. Pershan, USA Dr K. C. Prince, Italy Prof. S. A. Rice, USA Dr A. Robinson, West Germany Dr I. K. Robinson, USA Dr K. M. Robinson, USA Prof. R. Rosei, Italy Dr R. G. van Silfhout, The Netherlands Prof. J. V. Smith, USA Prof. J. F. van der Veen, The NetherlandsCONTENTS 1 21 31 41 51 65 77 91 107 119 137 143 159 169 181 191 20 1 21 1 23 1 247 259 275 29 1 Introductory Lecture. Structural Investigations of Adsorbed Layers using Syn- chrotron Radiation A. M. Bradshaw Glancing Angle XAFS and X-Ray Reflectivity Studies of Transition- metal/Aluminium Interfaces In Situ Structural Studies of the Passive Film on Iron and Iron/Chromium Alloys using X-Ray Absorption Spectroscopy M.Kerkar, J. Robinson and A. J. Forty Electrochemical Inclusion of Copper and Iron Species in a Conducting Polymer observed In Situ using Time-resolved X-Ray Absorption Spectroscopy D. Guay, G. Tourillon and A. Fontaine X-Ray Absorption Spectroscopy under Conditions of Total External Reflection: Application to the Structural Characterisation of the Cu/GaAs( 100) Interface S. Pizzini, K. J. Roberts, G. N. Greaves, N. T. Barrett, I. Dring and R. J. Oldman General Discussion Sulphur-induced Structural Chemistry of Oxide Surfaces C. A. Muryn, D. Purdie, P.Hardman, A. L. Johnson, N. S. Prakash, G. N. Raiker, G. Thornton and D. S-L. Law I n Situ Studies of Supported Rhodium Catalysts P. Johnston, R. W. Joyner, P. D. A. Pudney, E. S. Shpiro and B. P. Williams Characterisation of Oxide-supported Alkene Conversion Catalysts using X-Ray Absorption Spectroscopy Structural Studies of High-area Zeolitic Adsorbents and Catalysts by a Combina- tion of High-resolution X-Ray Powder Diffraction and X-Ray Absorption Spec- troscopy E. Dooryhee, G. N. Greaves, A. T. Steel, R. P. Townsend, s. W. Carr, J. M. Thomas and C. R. A. Catlow EXAFS Study of the Influence of Hydrogen Desorption and Oxygen Adsorption on the Structural Properties of Small Indium Particles Supported on A1203 F. W. H. Kampers and D. C. Koningsberger General Discussion Structure and Roughening of the Pt( 110) Surface I.K. Robinson, E. Vlieg and K. Kern Structure of the Ge( 11 1)-c(2 x 8) Surface as determined from Scattered X-Ray Intensities along Crystal Truncation Rods R. G. van Silfhout, J. F. van der Veen, C. Norris and J. E. Macdonald X-Ray Scattering from Surfaces and Interfaces R. A. Cowley and C. A. Lucas X-Ray Scattering from Semiconductor Interfaces J. E. Macdonald General Discussion Langmuir Monolayers: Structures and Phase Transitions Z-h. Cai and S. A. Rice Structure of Surface and Interfaces as studied using Synchrotron Radiation: Liquid Surfaces P. S. Pershan Genera 1 Discuss ion Core-level Shift Spectroscopy on Tungsten Surfaces: Overlayer and Underlayer Adsorption Characterization of Metal/Organic Molecule and Metal/ Polymer Interfaces by NEXAFS Spectroscopy G. Tourillon, D. Guay, A. Fontaine, R. Garrett and G. P. Williams Structure of the Surface Methoxy Species on Cu{ 11 1) D. E. Ricken, J. Sorners, A. W. Robinson and A. M. Bradshaw s. M. Heald, E. V. Barrera and H. Chen J. Evans, J. T. Gauntlett and J. F. W. Mosselmans G. P. Derby and D. A. King301 Normal-incidence Standing X-Ray Wavefield Adsorption and SEXAFS Studies of Adsorption Structures on Cu and Ni Surfaces N. P. Prince, M. J. Ashwin, D. P. Woodruff, N. K. Singh, W. Walter and R. G. Jones Photoelectron Diffraction Study of 0, N and C Adsorption Structures on Ni( 100) and Cu(ll0) A. L. D. Kilcoyne, D. P. Woodruff, A. Robinson, Th. Lindner, J. Somers, D. E. Ricken and A. M. Bradshaw Study of Xenon Layers on a Cu( 11 1) Surface J. Jupille, J-J. Ehrhardt, D. Fargues and A. Cassuto 31 1 323 329 General Discussion 341 Index of Names