At the International Summer Institute in Surface Science (ISISS), which is held bienially on the Campus of the University of Wisconsin-Milwaukee, invited speakers present tutorial review lectures during the course of one week. The majority of the presentations deal with the gas-solid interface, but now and then relevant reviews concerning liquid-solid or solid-solid interfaces are included. The goal of ISISS was outlined in the first ISISS publication: "We recognize that the International Summer Institute in Surface Science should foster mutual understanding and interaction among theorists and experimentalists in the various areas of surface science. Progress can be achieved only when we occasionally peek over the fence into neighboring areas, not so much to amuse ourselves that the grass is greener on the other side as to learn from their progress and, perhaps equally fruitfully, from their limitations and setbacks. In addition, it is an important task in any field of science to assess, take count of what is done and, what is more important, to point in future directions. " Since the foundation of ISISS in 1973, the invited speakers - internation ally recognized experts in their area of specialization - have been asked to write review articles too. We wanted in this way to ensure that the largest possible group of scientists could benefit from the special review concept. 1. Development of Photoemission as a Tool for Surface Science: 1900-1980.- 1.1 Introduction.- 1.2 The Einstein Era: 1900-1930.- 1.3 The Period of Misguided Quantum Mechanics: 1930-1945.- 1.4 The Development of the Correct Fundamental Understanding of the Photoemission Process: 1945-1960.- 1.5 The Development of Photoemission Spectroscopy: 1960-1970.- 1.6 The Explosive Era in Which Photoemission Spectroscopy Was Successfully Applied to the Study of Surfaces: 1970-1980.- 1.7 Conclusions.- References.- 2. Auger Spectroscopy as a Probe of Valence Bonds and Bands.- 2.1 Introduction.- 2.2 Lineshape Description - One-Electron Model.- 2.2.1 Atomic Auger Matrix Elements.- 2.2.2 Local or Mulliken Populations.- 2.3 Localization.- 2.4 Screening.- 2.5 Outlook.- 2.5.1 ESD/PSD.- 2.5.2 AES in the Gas Phase and Chemisorbed Systems.- 2.5.3 AES in the Bulk and at Interfaces.- 2.6 Summary.- References.- 3. SIMS of Reactive Surfaces.- 3.1 Introduction.- 3.2 Single Crystal Metal Surfaces.- 3.2.1 Characteristics of SIMS.- 3.2.2 CO and O2 on Ru{001}.- 3.2.3 Classical Dynamics Modelling.- 3.2.4 Structure from Angle Dependence.- 3.2.5 Reactive Intermediates.- 3.3 Molecular SIMS.- 3.3.1 SIMS of Molecular Solids.- 3.3.2 Thiophene on Silver.- 3.3.3 Inorganic Complexes.- 3.4 Complex Surfaces.- 3.4.1 Proximity.- 3.4.2 Prospects for Catalysis.- 3.5 Conclusions.- References.- 4. Chemisorption Investigated by Ellipsometry.- 4.1 Introduction.- 4.2 Principles of Ellipsometry.- 4.3 (Sub)Monolayer Models.- 4.4 Clean Metal Surfaces.- 4.5 Spectroscopic Ellipsometry of Overlayers.- 4.6 Kinetic Studies of Chemisorption.- 4.6.1 Coverage Calibration.- 4.6.2 Initial Stages of Oxidation.- 4.6.3 Reactions of Adsorbed Oxygen.- References.- 5. The Implications for Surface Science of Doppler-Shift LaserFluorescence Spectroscopy.- 5.1 Introduction.- 5.2 Charge Transfer Processes at Surfaces.- 5.3 Laser Fluorescence Spectroscopic Measurements of Fluxes and Energy Distributions of Sputtered Particles.- References.- 6. Analytical Electron Microscopy in Surface Science.- 6.1 Introduction.- 6.2 Analytical Electron Microscopy Techniques.- 6.3 Scanning Electron Microscopy of Surfaces.- 6.4 Surface Spectroscopies and Microscopy.- 6.4.1 Auger Electron Spectroscopy and Microscopy.- 6.4.2 Secondary Electron Spectroscopy and Work Function Imaging.- 6.4.3 Photoemission and Energy-Loss Spectroscopy.- 6.5 Diffraction Techniques and Microscopy.- 6.5.1 Transmission Electron Diffraction and Microscopy.- 6.5.2 RHEED and Reflection Microscopy.- 6.5.3 LEED and Low-Energy Microscopy.- References.- 7. He Diffraction as a Probe of Semiconductor Surface Structures.- 7.1 Introduction.- 7.2 Si{100}: Disordered Dimer Array.- 7.2.1 Si{100} Periodicity.- 7.2.2 Diffraction Scans and Qualitative Features of the Si{100} Surface.- 7.2.3 Specular Intensities.- 7.2.4 Structural Models for Si{100}.- 7.3 GaAs {110}.- 7.3.1 Diffraction Scans.- 7.3.2 Specular Intensity Scans.- 7.3.3 Rigorous Calculation of Diffraction Intensities.- 7.3.4 The Original of the He/GaAs Potential.- 7.3.5 Computation of Rarified Charge Densities.- 7.3.6 Summary.- 7.4 Si{111} (7×7).- 7.4.1 Diffraction Scans.- 7.4.2 Specular Intensity Interference.- 7.4.3 A Model of the Si{111} (7×7).- 7.4.4 Summary.- References.- 8. Studies of Adsorption at Well-Ordered Electrode Surfaces Using Low-Energy Electron Diffraction.- 8.1 Introduction.- 8.2 Thermodynamics of Electrodeposition.- 8.3 Experimental Methods.- 8.4 Underpotential States of Hydrogen on Pt.- 8.4.1 Isotherms for Hydrogen on {111} and {100} Pt.- 8.4.2 Hydrogen at SteppedSurfaces.- 8.5 Underpotential States of Oxygen on Pt.- 8.6 Underpotential States of Metals on Metals.- 8.7 Relation of the Underpotential State to the Chemisorbed State in Vacuum.- References.- 9. Low-Energy Electron Diffraction Studies of Physically Adsorbed Films.- 9.1 Introduction.- 9.2 Background.- 9.3 LEED Instrument.- 9.4 Krypton on Graphite.- 9.5 Arçon on Graphite.- 9.5.1 Rotational Epitaxy of an Incommensurate Monola
