Table of Contents

Preface; 1 Introduction; 2 Liquid surfaces; 2.1 Microscopic picture of the liquid surface; 2.2 Surface tension; 2.3 Equation of Young and Laplace; 2.3.1 Curved liquid surfaces; 2.3.2 Derivation of the Young-Laplace equation; 2.3.3 Applying the Young-Laplace equation; 2.4 Techniques to measure the surface tension; 2.5 The Kelvin equation; 2.6 Capillary condensation; 2.7 Nucleation theory; 2.8 Summary; 2.9 Exercises; 3 Thermodynamics of interfaces; 3.1 The surface excess; 3.2 Fundamental thermodynamic relations; 3.2.1 Internal energy and Helmholtz energy; 3.2.2 Equilibrium conditions; 3.2.3 Location of the interface; 3.2.4 Gibbs energy and definition of the surface tension; 3.2.5 Free surface energy, interfacial enthalpy and Gibbs surface energy; 3.3 The surface tension of pure liquids; 3.4 Gibbs adsorption isotherm; 3.4.1 Derivation; 3.4.2 System of two components; 3.4.3 Experimental aspects; 3.4.4 The Marangoni effect; 3.5 Summary; 3.6 Exercises; 4 The electric double layer; 4.1 Introduction; 4.2 Poisson-Boltzmann theory of the diffuse double layer; 4.2.1 The Poisson-Boltzmann equation; 4.2.2 Planar surfaces; 4.2.3 The full one-dimensional case; 4.2.4 The Grahame equation; 4.2.5 Capacity of the diffuse electric double layer; 4.3 Beyond Poisson-Boltzmann theory; 4.3.1 Limitations of the Poisson-Boltzmann theory; 4.3.2 The Stern layer; 4.4 The Gibbs free energy of the electric double layer; 4.5 Summary; 4.6 Exercises; 5 Effects at charged interfaces; 5.1 Electrocapillarity; 5.1.1 Theory; 5.1.2 Measurement of electrocapillarity; 5.2 Examples of charged surfaces; 5.2.1 Mercury; 5.2.2 Silver iodide; 5.2.3 Oxides; 5.2.4 Mica; 5.2.5 Semiconductors; 5.3 Measuring surface charge densities; 5.3.1 Potentiometric colloid titration; 5.3.2 Capacitances; 5.4 Electrokinetic phenomena: The zeta potential; 5.4.1 The Navier-Stokes equation; 5.4.2 Electro-osmosis and streaming potential; 5.4.3 Electrophoresis and sedimentation potential; 5.5 Types of potentials; 5.6 Summary; 5.7 Exercises; 6 Surface forces; 6.1 Vander Waals forces between molecules; 6.2 The van der Waals force between macroscopic solids; 6.2.1 Microscopic approach; 6.2.2 Macroscopic calculation Lifshitz theory; 6.2.3 Surface energy and Hamaker constant; 6.3 Concepts for the description of surface forces; 6.3.1 The Derjaguin approximation; 6.3.2 The disjoining pressure; 6.4 Measurement of surface forces; 6.5 The electrostatic double-layer force; 6.5.1 General equations; 6.5.2 Electrostatic interaction between two identical surfaces; 6.5.3 The DLVO theory; 6.6 Beyond DLVO theory; 6.6.1 The solvation force and confined liquids; 6.6.2 Non DLVO forces in an aqueous medium; 6.7 Steric interaction; 6.7.1 Properties of polymers; 6.7.2 Force between polymer coated surfaces; 6.8 Spherical particles in contact; 6.9 Summary; 6.10 Exercises; 7 Contact angle phenomena and wetting; 7.1 Young's equation; 7.1.1 The contact angle; 7.1.2 Derivation; 7.1.3 The line tension; 7.1.4 Complete wetting; 7.2 Important wetting geometries; 7.2.1 Capillary rise; 7.2.2 Particles in the liquid-gas interface; 7.2.3 Network of fibres; 7.3 Measurement of the contact angle; 7.3.1 Experimental methods; 7.3.2 Hysteresis in contact angle measurements; 7.3.3 Surface roughness and heterogeneity; 7.4 Theoretical aspects of contact angle phenomena; 7.5 Dynamics of wetting and dewetting; 7.5.1 Wetting; 7.5.2 Dewetting; 7.6 Applications; 7.6.1 Flotation; 7.6.2 Detergency; 7.6.3 Microfluidics; 7.6.4 Adjustable wetting; 7.7 Summary; 7.8 Exercises; 8 Solid surfaces; 8.1 Introduction; 8.2 Description of crystalline surfaces; 8.2.1 The substrate structure; 8.2.2 Surface relaxation and reconstruction; 8.2.3 Description of adsorbate structures; 8.3 Preparation of clean surfaces; 8.4 Thermodynamics of solid surfaces; 8.4.1 Surface stress and surface tension; 8.4.2 Determination of the surface energy; 8.4.3 Surface steps and defects; 8.5 Solid-solid boundaries; 8.6 Microscopy of solid surfaces; 8.6.1 Optical microscopy; 8.6.2 Electron microscopy; 8.6.3 Scanning probe microscopy; 8.7 Diffraction methods; 8.7.1 Diffraction patterns of two-dimensional periodic structures; 8.7.2 Diffraction with electrons, X-rays, and atoms; 8.8 Spectroscopic methods; 8.8.1 Spectroscopy using mainly inner electrons; 8.8.2 Spectroscopy with outer electrons; 8.8.3 Secondary ion mass spectrometry; 8.9 Summary; 8.10 Exercises; 9 Adsorption; 9.1 Introduction; 9.1.1 Definitions; 9.1.2 The adsorption time; 9.1.3 Classification of adsorption isotherms; 9.1.4 Presentation of adsorption isotherms; 9.2 Thermodynamics of adsorption; 9.2.1 Heats of adsorption; 9.2.2 Differential quantities of adsorption and experimental results; 9.3 Adsorption models; 9.3.1 The Langmuir adsorption isotherm; 9.3.2 The Langmuir constant and the Gibbs energy of adsorption; 9.3.3 Langmuir adsorption with lateral interactions; 9.3.4 The BET adsorption isotherm; 9.3.5 Adsorption on heterogeneous surfaces; 9.3.6 The potential theory of Polanyi; 9.4 Experimental aspects of adsorption from the gas phase; 9.4.1 Measurement of adsorption isotherms; 9.4.2 Procedures to measure the specific surface area; 9.4.3 Adsorption on porous solids hysteresis; 9.4.4 Special aspects of chemisorption; 9.5 Adsorption from solution; 9.6 Summary; 9.7 Exercises; 10 Surface modification; 10.1 Introduction; 10.2 Chemical vapor deposition; 10.3 Soft matter deposition; 10.3.1 Self-assembled monolayers; 10.3.2 Physisorption of Polymers; 10.3.3 Polymerization on surfaces; 10.4 Etching techniques; 10.5 Summary; 10.6 Exercises; 11 Friction, lubrication, and wear; 11.1 Friction; 11.1.1 Introduction; 11.1.2 Amontons' and Coulomb's Law; 11.1.3 Static, kinetic, and stick-slip friction; 11.1.4 Rolling friction; 11.1.5 Friction and adhesion; 11.1.6 Experimental Aspects; 11.1.7 Techniques to measure friction; 11.1.8 Macroscopic friction; 11.1.9 Microscopic friction; 11.2 Lubrication; 11.2.1 Hydrodynamic lubrication; 11.2.2 Boundary lubrication; 11.2.3 Thin film lubrication; 11.2.4 Lubricants; 11.3 Wear; 11.4 Summary; 11.5 Exercises; 12 Surfactants, micelles, emulsions, and foams; 12.1 Surfactants; 12.2 Spherical micelles, cylinders, and bilayers; 12.2.1 The critical micelle concentration; 12.2.2 Influence of temperature; 12.2.3 Thermodynamics of micellization; 12.2.4 Structure of surfactant aggregates; 12.2.5 Biological membranes; 12.3 Macroemulsions; 12.3.1 General properties; 12.3.2 Formation; 12.3.3 Stabilization; 12.3.4 Evolution bandaging; 12.3.5 Coalescence and demulsification; 12.4 Microemulsions; 12.4.1 Size of droplets; 12.4.2 Elastic properties of surfactant films; 12.4.3 Factors influencing the structure of microemulsions; 12.5 Foams; 12.5.1 Classification, application and formation; 12.5.2 Structure of foams; 12.5.3 Soap films; 12.5.4 Evolution of foams; 12.6 Summary; 12.7 Exercises; 13 Thin films on surfaces of liquids; 13.1 Introduction; 13.2 Phases of monomolecular films; 13.3 Experimental techniques to study monolayers; 13.3.1 Optical methods; 13.3.2 X-ray reflection and diffraction; 13.3.3 The surface potential; 13.3.4 Surface elasticity and viscosity; 13.4 Langmuir-Blodgett transfer; 13.5 Thick films - spreading of one liquid on another; 13.6 Summary; 13.7 Exercises; 14 Solutions to exercises; Appendix; A Analysis of diffraction patterns; A.1 Diffraction at three dimensional crystals; A.1.1 Bragg condition; A.1.2 Laue condition; A.1.3 The reciprocal lattice; A.1.4 Ewald construction; A.2 Diffraction at Surfaces; A.3 Intensity of diffraction peaks; B Symbols and abbreviations; Bibliography; Index

About the Author

Hans-Jurgen Butt studied physics at the Universities of Hamburg and Gottingen, Germany. Then he went to the Max-Planck-Institute of Biophysics in Frankfurt. After receiving his Ph.D. in 1989 he went as a postdoc to Santa Barbara, California, and learned using the newly developed atomic force microscope. From 1990-95 he spent as a researcher back in Germany at the Max-Planck-Institute for Biophysics. In 1996 he became associate professor at the University of Mainz. Three years later he moved to Siegen to become full professor for physical chemistry. Only two years later he joined the Max-Planck-Institute of Polymer Research in Mainz. Karlheinz Graf studied chemistry at the universities of Erlangen and Mainz, Germany. After receiving his Ph.D. in Physical Chemistry in 1997, he went as a postdoc to Santa Barbara, California working on physicochemical aspects of myelin and lung surfactant. Back in Mainz he investigated nanostructured lipopolymer films. Scince 2001 he is working on model systems for microsystem technology in the group of Prof. Hans-Jurgen Butt at the Max-Planck-Institut for Polymer Research and the University of Siegen. Michael Kappl studied physics at the University of Regensburg and the Technical University of Munich. He finished his PhD at the Max-Planck-Institute of Biophysics in Frankfurt/Main in 1996. From 1997 - 1998 he did one and a half years of postdoctoral research at the University of Mainz in the group of Prof. Butt. From 1998-2000 he worked as a IT consultant at Pallas Soft AG, Regensburg. In 2000, he rejoined the group of Prof. Butt at the University of Siegen. Since end of 2002 he is project leader at the MPI for Polymer research in Mainz.

Reviews

"...a general yet comprehensive introduction to surface and interface science..." (Materials World, Vol 12(2), Feb 2004)