Optical Properties of Metal Clusters


Book Description

Optical Properties of Metal Clusters deals with the electronic structure of metal clusters determined optically. Clusters - as state intermediate between molecules and the extended solid - are important in many areas, e.g. in air pollution, interstellar matter, clay minerals, photography, heterogeneous catalysis, quantum dots, and virus crystals. This book extends the approaches of optical molecular and solid-state methods to clusters, revealing how their optical properties evolve as a function of size. Cluster matter, i.e. extended systems of many clusters - the most frequently occuring form - is also treated. The combination of reviews of experimental techniques, lists of results and detailed descriptions of selected experiments will appeal to experts, newcomers and graduate students in this expanding field.



















Optical Properties of Size-selected Supported Metal Clusters Measured by Cavity Ring-down Spectroscopy


Book Description

Supported size-selected metal clusters have attracted considerable interest due to their special catalytic properties. Optical spectroscopy is a powerful method to characterise the electronic and geometrical properties of such systems. However, observing the optical properties of these small clusters is not trivial and highly sensitive techniques such as cavity ring-down spectroscopy (CRDS), a method previously used to study gas phase samples, are required. An experimental apparatus capable of studying the optical properties of support size-selected metal clusters is presented here for the first time. The metal clusters were prepared using a state-of-the-art laser ablation source, and size selected prior to deposition onto an optically transparent support material. CRDS was adapted for the study of solid samples over an extended wavelength range and used to investigate the size dependent optical properties of supported metal clusters.







Nanotechnology


Book Description

The only reference book which discusses the usage of nanoprobes for structure determination, in an industry where miniaturisation is the main focus. Designed for newcomers as well as professionals already in the industry.




Structure and Properties of Atomic Nanoclusters


Book Description

Atomic clusters are aggregates of atoms containing a few to several thousand atoms. Due to the small size of these pieces of matter, the properties of atomic clusters in general are different from those of the corresponding material in the macroscopic bulk phase. This monograph presents the main developments of atomic clusters and the current status of the field. The book treats different types of clusters with very different properties: clusters in which the atoms or molecules are tied by weak van der Waals interactions, metallic clusters, clusters of ionic materials, and network clusters made of typical covalent elements. It includes methods of experimental cluster synthesis as well as the structural, electronic, thermodynamic and magnetic properties of clusters, covering both experiments and the theoretical work that has led to our present understanding of the different properties of clusters. The question of assembling nanoclusters to form solids with new properties is also considered. Having an adequate knowledge of the properties of clusters can be of great help to any scientist working with objects of nanometric size. On the other hand, nanoclusters are themselves potentially important in fields like catalysis and nanomedicine.