Investigations of the melting of gold nanocrystalline clusters, using molecular dynamics simulations, reveal that at elevated temperatures the melting process is punctuated by solid-to-solid structural transformations from the low-temperature optimal structures (a truncated octahedron for Au459, and a truncated decahedron for Au146) to icosahedral structures, occurring as precursors to the melt...

A laser vaporisation source and a time-of-flight mass spectrometer are used for the production and detection of TiArn Ž . clusters. Parallel, density functional theory DFT calculations assist in extracting the structures of the first members of the series. The mass spectrum is dominated by one intense line of TiAr , for which the DFT calculations predict a regular 6 octahedron. q 1999 Elsevier ...

Three-dimensional mesoscale clusters that are formed from nanoparticles spatially arranged in pre-determined positions can be thought of as mesoscale analogues of molecules. These nanoparticle architectures could offer tailored properties due to collective effects, but developing a general platform for fabricating such clusters is a significant challenge. Here, we report a strategy for assembli...

The energetics of nickel clusters over a broad size range are explored within the context of the many-body potentials obtained via the embedded atom method. Unconstrained local minimum energy configurations are found for single crystal clusters consisting of various truncations of the cube or octahedron, with and without ( 110) faces, as well as some monotwinnings of these. We also examine mult...

An interesting area in static analysis is the study of numerical properties. Complex properties can be analyzed using abstract interpretation, provided that an adequate abstract domain is defined. Each domain can represent and manipulate a family of properties, providing a different trade-off between the precision and complexity of the analysis. The contribution of this paper is a new numerical...

The computational cost of conventional lter methods for junction characterization is very high. This burden can be attenuated by using steerable lters. However, in order to achieve a high orientational selectivity to characterize complex junctions a large number of basis lters is necessary. From this results a yet too high computational eeort for steerable lters. In this paper we present a new ...