Richard G. Forbes
Basically because small, sharp, bright field electron emitters are thought to have potential uses as electron sources, particularly in electron-beam instruments. Whether any new material will eventually compete effectively with present tungsten-based single-tip sources in another matter. However, with large-area field electron emitters consisting of many individual emitters, there is probably still merit in exploring alternatives, even though carbon based emitters (nanotubes and nanofibres) look by far the strongest candidates at present.
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