Ultrananocrystalline diamond (UNCD) is one of the important triad
of nanostructured carbons which includes fullerenes and nanotubes.
This new kind of diamond composed of 3a "5 nm crystallites is an
exemplar par excellence of the profound changes in properties that
can accompany the reduction in size of a material to low single
digit nanometer dimensions. UNCD occurs in two forms: as a
dispersed powder made by detonation techniques and as a chemical
vapor deposited film. Two communities of scientists, each focused
on one of these fields, had up to now, been working independently
of each other largely unaware of the vast synergistic relationships
existing between them. The NATO Advanced Research Workshop (ARW),
the basis for the Proceedings, was held June 7a "10 in St.
Petersburg, Russia to bring the two communities closer together.
Fostering collaborations between them, to hasten the exploitation
of the scientific and technological treasure trove awaiting
imaginative explorers to reveal the still largely untapped
potential hidden in these materials.
This Proceedings volume will be of interest to a wide audience
of scientists and engineers - indeed all those who wish to become
familiar with the unique properties of UNCD particles and films
that make them potentially very useful for a wide variety of
applications. It is particularly noteworthy that much of the
Russian work on disperse UNCD is available here in English for the
first time. The outstanding experts in the two fields are
represented in this volume discussing the basic theoretical
concepts underlying the synthesis and characterization of these
nanomaterials on the one hand and describing progress that has been
made inseveral areas of applications. For UNCD particles,
applications include their use in nanocomposites, selective
adsorbents, colloidal suspensions, microabrasives, lubricants,
quantum dots, cold-cathodes and many others. For UNCD films, their
smooth, highly dense, pin-hole free characteristics lead to
conformal coatings of very high aspect ratio structures and
applications in MEMS, biosensors, as well as electrochemical, and
nerve prostheses. The films can be made both n- and p-type
conducting thus enabling many potential electronic applications
such as high temperature, highly rectifying diodes, FETa (TM)s,
thermoelectrics, etc.
The Proceedings will be very useful as an introduction to an
important and rapidly evolving field of nanoscience and
nanomaterials; as a text for a special topics graduate course; or
as a starting point for those interested in the development of new
approaches to problems that have hitherto defied solution for lack
of suitable materials. It is to be hoped that the wider scientific
community will be as intrigued and challenged by these
presentations as were the participants of the NATO ARW.
General
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