Carbon Nanotube Electron Sources: From Electron Beams to Energy Conversion and Optophononics
Figure 7
(a) A forest of vertically aligned carbon nanotubes, grown through chemical vapor deposition on a silicon substrate using an iron catalyst layer on an alumina buffer layer, is illuminated by ultraviolet light in photoemission experiments. Inset shows a scanning electron micrograph of the side of the forest, revealing the overall alignment of the nanotubes; (b) the electron emission current of the device as a function of cathode-anode voltage with and without illumination (reprinted with permission from [160]. Copyright 2010, AIP Publishing LLC).
