1. Introduction and motivation. 1.1. Introduction. 1.2. Short outline of the history of tribology. 1.3. Leonardo da Vinci (1452-1519). 1.4. Guillaume Amontons (1663-1705). 1.5. Leonhard Euler (1707-1783). 1.6. Charles Augustin Coulomb (1736-1806). 1.7. Friction and wear. 1.8. Friction on a macroscopic scale. 1.9. The Bowden and Tabor adhesion model. 1.10. The shear strength. 1.11. The real area of contact -- 2. Instruments. 2.1. Introduction to instruments. 2.2. Tribometer experiments. 2.3. Extensions of tribometers. 2.4. Surface force apparatus. 2.5. Resonant stick-slip motion in colloidal crystals. 2.6. Quartz crystal microbalance. 2.7. Friction force microscopy. 2.8. Extensions of friction force microscopy: Nanosled experiments -- 3. Normal forces at the atomic scale. 3.1. Important forces between atoms and molecules. 3.2. Important forces between probing tip and sample. 3.3. Microscopic description of the tip-sample contact. 3.4. True atomic resolution with normal forces -- 4. Understanding of lateral forces. 4.1. Geometrical effects: the role of topography. 4.2. Step edges and Schwoebel barriers. 4.3 Atomic-scale friction: Tomlinsons mechanism. 4.4. A modern analysis of Tomlinsons mechanism. 4.5. Comparison of atomic-scale stick slip with the Tomlinson plucking mechanism. 4.6. Friction between atomically flat surfaces. 4.7. Molecular dynamics simulations: quantitative results -- 5. Dissipation mechanisms. 5.1. Introduction. 5.2. Friction behaviour in the limit [symbol]. 5.3. Phononic friction. 5.4. Electronic friction. 5.5. Van der Waals friction. 5.6. Comparison -- 6. Nanorheology and nanoconfinement. 6.1. Introduction. 6.2. Continuum mechanics. 6.3. Nanorheological and shear behavior of confined liquids. 6.4. Nanorheological and shear behavior of complex liquids. 6.5. Nanorheological and mechanical properties of polymeric surfaces and thin films measured by SFM -- 7. Generation of ultrasonic waves insliding friction. 7.1. Abstract. 7.2. Introduction. 7.3. The stick-slip process between flat surfaces with adsorbedsoft molecules. 7.4. Stick-slip processes between ideally flat surfaces without adsorbed soft molecules. 7.5 Excitations of transverse acoustic vibrations in thin films by stick-slip processes. 7.6. Excitation of ultrasonic waves by friction between rough surfaces Theoretical considerations. 7.7. Previous experimental studies of acoustic emission. 7.8. Proposed experiments for the detection of high frequency ultrasonic waves generated by friction. 7.9. On the possible reduction of friction by ultrasonic waves. 7.10. Conclusions. 7.11. Acknowledgements. 7.12. References -- 8. Friction force microscopy experiments. 8.1. Material-specific contrast of friction force microscopy. 8.2. Anisotropy of friction. 8.3. Role of environment. 8.4. Chemical nature of probing tip. 8.5. Traditional and new concepts to understand the material-specific contrasts of FFM.
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Friction force microscopy is an important analytical tool in the field of tribology on the nanometer-scale. The contact area between the probing tip and the sample is reduced to some square nanometers, corresponding to the ideal of a single asperity contact. Traditional concepts, such as friction coefficients, adhesion and elasticity and stick-slip are re-examined with this novel technique. New concepts based upon classical and quantum mechanics are investigated.
Nanoscience.
9810225628
Nanoscience, friction and rheology on the nanometer scale