This is an attempt to directly produce arrays of near-monodispersed nanoparticles suitable for heterogeneous GMR films or for new types of storage media. This project is under the direction of Prof. David Miller, of the AMES Dept., UCSD. The clusters will be produced essentially by driving vaporized material into an expansion chamber, whereupon the adiabatic cooling yields a stream of clusters. This technique has been used to prepare clusters of a few hundred or so of atoms which can be readily filtered in a mass spectrograph. It is a significantly more difficult problem to produce and, particularly, to filter the much larger particles in which we are interested. Prof. Miller is examining new types of time-of-flight systems as a solution to the filtering problem. It is obvious that success in this effort will have enormous impact on the general field of nanoparticles, not just the GMR and media possibilities.