Peter R. Day - Böcker

This volume represents the written account of the NATO Advanced Study Institute "Lower-Dimensional Systems and Molecular Electronics" held at Hotel Spetses, Spetses Island, Greece from 12 June to 23 June 1989. The goal of the Institute was to demonstrate the breadth of chemical and physical knowledge that has been acquired in the last 20 years in inorganic and organic crystals, polymers, and thin films, which exhibit phenomena of reduced dimensionality. The interest in these systems started in the late 1960's with lower-dimensional inorganic conductors, in the early 1970's with quasi-one-dimensional crystalline organic conductors. which by 1979 led to the first organic superconductors, and, in 1977, to the fITSt conducting polymers. The study of monolayer films (Langmuir-Blodgett films) had progressed since the 1930's, but reached a great upsurge in . the early 1980's. The pursuit of non-linear optical phenomena became increasingly popular in the early 1980's, as the attention turned from inorganic crystals to organic films and polymers. And in the last few years the term "moleculw' electronics" has gained ever-increasing acceptance, although it is used in several contexts. We now have organic superconductors with critical temperatures in excess of 10 K, conducting polymers that are soluble and processable, and used commercially; we have films of a few monolayers that have high in-plane electrical conductivity, and polymers that show great promise in photonics; we even have a few devices that function almost at the molecular level.

All social work activity is influenced by the society in which it takes place. It is therefore inescapable that understanding sociology should help social workers to make a more effective contribution to people's welfare. The different perspectives which constitute sociology are examined and the book analyses the ways peoples' lives are powerfully influenced by social forces and 'social problems'. It is argued that sociology should help social workers to examine their assumptions and value judgements and develop their capacity to be questioning and discriminating about their methods and the policies which affect them and their clients.

This volume represents the written account of the NATO Advanced Study Institute "Lower-Dimensional Systems and Molecular Electronics" held at Hotel Spetses, Spetses Island, Greece from 12 June to 23 June 1989. The goal of the Institute was to demonstrate the breadth of chemical and physical knowledge that has been acquired in the last 20 years in inorganic and organic crystals, polymers, and thin films, which exhibit phenomena of reduced dimensionality. The interest in these systems started in the late 1960's with lower-dimensional inorganic conductors, in the early 1970's with quasi-one-dimensional crystalline organic conductors. which by 1979 led to the first organic superconductors, and, in 1977, to the fITSt conducting polymers. The study of monolayer films (Langmuir-Blodgett films) had progressed since the 1930's, but reached a great upsurge in . the early 1980's. The pursuit of non-linear optical phenomena became increasingly popular in the early 1980's, as the attention turned from inorganic crystals to organic films and polymers. And in the last few years the term "moleculw' electronics" has gained ever-increasing acceptance, although it is used in several contexts. We now have organic superconductors with critical temperatures in excess of 10 K, conducting polymers that are soluble and processable, and used commercially; we have films of a few monolayers that have high in-plane electrical conductivity, and polymers that show great promise in photonics; we even have a few devices that function almost at the molecular level.

Centrally important to the progress of inorganic chemistry is the application of new physical techniques for determining crystal and molecular structures. Electronic structure, too, can now be explored by a large variety of spectros­ copic techniques, most of them of quite recent origin. Realizing how essential it was to bring together experts in the techniques themselves and those who might use them for their own chemical purposes, Professor Furlani and I began in the early 1970's to organize small meetings at which this kind of interchange could take place. The first, funded by the Italian National Research Council and Ministry of Education, was at Frascati in 1971. It was followed by others at Oxford (1974) and Pugnochiuso (1977), funded under the NATO Advanced Study Institutes programme. Lectures given at the Oxford Advanced Study Institute were published by D. Reidel under the title Electronic States of Inorganic Compounds: New Experimental Techniques. A three­ year interval between these Institutes has proved suitable both for introducing new generations of potential users to the methods and allowing us to incorporate advances in the methods themselves. In fact, since the last Advanced Study Institute in the series several important advances have occurred, particularly in electron, ion and neutron spectros­ copies. We concentrated the course for 1980 on these newer aspects, though the more specialized lectures were prefaced with introductory material for those not familiar with the general principles.