Large-Scale Production of NbS2 Nanowires and Their Performance in Electronic Field EmissionWe thank the EPSRC (UK), UST-CNST of the National Tsing-Hua University, and the National Science Council (Taiwan, NSC92-2119M-007-072) for financial support.

In addition to carbon nanotubes, the production of noncarbon nanostructures has attracted much attention over the past few years. In particular, and due to their unusual geometry and promising physical properties, inorganic fullerene nanostructures have become one of the main focuses in nanoscale research since the first report of the synthesis of WS2 nanotubes in 1992. The synthesis of chalcogenide nanotubes and nested nanoparticles is difficult because their formation requires the release of considerable strain energy against