1. Preparation Methods for Nanoparticles and Cluster-Matter by “Physical” Means (U. Kreibig, Aachen) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Nanoparticles and Cluster Matter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2. Cluster-Matter Characterization and Properties . . . . . . . . . . . . . . . . . . . . 4 1.3. Particle Stability and Particle Stabilization . . . . . . . . . . . . . . . . . . . . . . . 6 1.4. Cluster Aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.5. Particle Production Methods: A Survey . . . . . . . . . . . . . . . . . . . . . . . . . 23 1.6. Atomic Vapor Aggregation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . 28 1.7. Lithography Techniques to Produce Ordered Cluster Arrays . . . . . . . . . . . . . 37 1.8. Concluding Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2. Nanostructured Metal Colloids—Chemistry and Potential Applications (H. Bönnemann, Mülheim) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2.1. Wet Chemical Preparation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2.2. Applications in Catalysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 2.3. Potential Applications in Materials Science . . . . . . . . . . . . . . . . . . . . . . 61 3. Characterization of the Geometric and Electronic Structure of Nanostructured Metal Colloids Using X-Ray Absorption Spectroscopy and Related Methods (J. Hormes, Bonn, Baton Rouge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 3.