Springer Series in Cluster Physics – serie

Clusters and nanoscale materials give rise to properties and behaviour that are governed by size restrictions, and hence display features directly attributable to quantum confinement. Thus they represent ideal media for observing and studying quantum phenomena. This book presents and evaluates some of the latest developments in this area of basic research. Each of the chapters focuses on selected aspects of the field, and the authors endeavour to display the breadth of the subject by presenting some of the important recent advances that have been made through the use of new experimental techniques and theoretical approaches.

The evolution of the physical/ chemical sciences towards understanding the behavior of matter at the molecular level has been accompanied by a rapid increase in studies of the properties and functioning of confined water; that is, water in small clusters and nanoparticles or confined to solid/liquid thin films, surfaces and interfaces. These studies represent a convergence of interests and methodologies. That is, much emerging science, both basic and applied, depends on an understanding of confined water for significant advances; and the technical ability to gain that understanding has evolved only during the past decade or two. Firm concepts of the behavior of water in a variety of confining geometries are basic to advances in molecular biology, weather phenomena, atmospheric chemistry, interstellar and interplanetary physics and chemistry; as weIl as to the complete understanding of properties of macroscopic amounts of water and water-solute systems. In recognition of the growing importance of studies of confined water, a Telluride (Colorado) workshop was convened in August of 2000. This was an exceptionally strong 5-day conference with numerous informative talks by leading scientists on both basic and applied aspects of the subject. Lively discussions left the participants spent.

The field of cluster science is currently attracting considerable interest, not only from a fundamental standpoint, but also through its future applications to electronic, optical, magnetic, and other devices. Synthesizing specific clus­ ters as a unit of useful nanostructures or controlling them as an assembly of nanocomposites is one of the ultimate purposes in this field. In order to understand how to synthesize individual clusters and t_o investigate physical properties, chemical reactions, structural stability, response to external fields, aggregation, phase transition, and other aspects of clusters, a great deal of effort has gone into experiment, theory and computer simulation in this area. This is presumably motivated by the fact that a high level of collaboration between theoretical and experimental researchers is particularly important for progress in the field of cluster science. The present book aims to collect together recent advances in this rapidly growing field. The authors are all active researchers, collaborating both ex­ perimentally and theoretically in this field, and most of them have regularly participated in the IMR Workshop, held for three years starting from 1998 at the Institute for Materials Research in Tohoku University. This book is suitable for both theoretical and experimental researchers and also for re­ searchers and graduate students working in related subjects, who wish to overview recent advances in the field.

Numerous experiments and calculations have shown that isolated metal clusters possess many interesting features, quite different from those known from surface and solid- state physics or from atomic and molecular physics. The technological exploitation of these new properties, e.g. in miniature electronic or mechanical components, requires the cluster to be brought into an environment such as an encapsulating matrix or a surface. Due to the interaction with the contact medium, the properties of the clusters may change or even disappear. Thus the physics of cluster-on-surface systems -- the main subject of this book -- is of fundamental importance. The book addresses a wide audience, from the newcomer to the expert. Starting from fundamental concepts of adsorbate-surface interactions, the modification of electronic properties through electron confinement, and concepts of cluster production, it elucidates the distinct properties of the new metallic nanostructures.

Clusters and nanoscale materials give rise to properties and behaviour that are governed by size restrictions, and hence display features directly attributable to quantum confinement. Thus they represent ideal media for observing and studying quantum phenomena. This book presents and evaluates some of the latest developments in this area of basic research. Each of the chapters focuses on selected aspects of the field, and the authors endeavour to display the breadth of the subject by presenting some of the important recent advances that have been made through the use of new experimental techniques and theoretical approaches.

The evolution of the physical/ chemical sciences towards understanding the behavior of matter at the molecular level has been accompanied by a rapid increase in studies of the properties and functioning of confined water; that is, water in small clusters and nanoparticles or confined to solid/liquid thin films, surfaces and interfaces. These studies represent a convergence of interests and methodologies. That is, much emerging science, both basic and applied, depends on an understanding of confined water for significant advances; and the technical ability to gain that understanding has evolved only during the past decade or two. Firm concepts of the behavior of water in a variety of confining geometries are basic to advances in molecular biology, weather phenomena, atmospheric chemistry, interstellar and interplanetary physics and chemistry; as weIl as to the complete understanding of properties of macroscopic amounts of water and water-solute systems. In recognition of the growing importance of studies of confined water, a Telluride (Colorado) workshop was convened in August of 2000. This was an exceptionally strong 5-day conference with numerous informative talks by leading scientists on both basic and applied aspects of the subject. Lively discussions left the participants spent.

The field of cluster science is currently attracting considerable interest, not only from a fundamental standpoint, but also through its future applications to electronic, optical, magnetic, and other devices. Synthesizing specific clus­ ters as a unit of useful nanostructures or controlling them as an assembly of nanocomposites is one of the ultimate purposes in this field. In order to understand how to synthesize individual clusters and t_o investigate physical properties, chemical reactions, structural stability, response to external fields, aggregation, phase transition, and other aspects of clusters, a great deal of effort has gone into experiment, theory and computer simulation in this area. This is presumably motivated by the fact that a high level of collaboration between theoretical and experimental researchers is particularly important for progress in the field of cluster science. The present book aims to collect together recent advances in this rapidly growing field. The authors are all active researchers, collaborating both ex­ perimentally and theoretically in this field, and most of them have regularly participated in the IMR Workshop, held for three years starting from 1998 at the Institute for Materials Research in Tohoku University. This book is suitable for both theoretical and experimental researchers and also for re­ searchers and graduate students working in related subjects, who wish to overview recent advances in the field.

Numerous experiments and calculations have shown that isolated metal clusters possess many interesting features, quite different from those known from surface and solid- state physics or from atomic and molecular physics. The technological exploitation of these new properties, e.g. in miniature electronic or mechanical components, requires the cluster to be brought into an environment such as an encapsulating matrix or a surface. Due to the interaction with the contact medium, the properties of the clusters may change or even disappear. Thus the physics of cluster-on-surface systems -- the main subject of this book -- is of fundamental importance. The book addresses a wide audience, from the newcomer to the expert. Starting from fundamental concepts of adsorbate-surface interactions, the modification of electronic properties through electron confinement, and concepts of cluster production, it elucidates the distinct properties of the new metallic nanostructures.

The book appeals to physicists and chemical physicists who are involved in theoretical and experimental studies of clusters. Clusters represent an intermediate state of matter located between isolated atoms and solids.

The book presents a new method of producing high-performance surface layers with physically new properties. Cluster beam techniques are very powerful and of relevance for a broad audience including physicists, chemists and materials scientists. This book is the first to approach these subjects and will be very useful for scientists involved in this fast growing and technologically promising field.