Carbon nanotubes as electron source in an x-ray tube

Sugie, H.; Tanemura, M.; Filip, V.; Iwata, K.; Takahashi, K.; Okuyama, F.
April 2001
Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2578
Academic Journal
Field emitters comprised of aligned carbon nanotubes are shown to be promising as a primary electron source in an x-ray tube working in a nonultrahigh vacuum ambience. At a pressure of 2x10[sup -7] Torr, the nanotube emitters continue to emit electrons for more than 1 h, and yield better resolved x-ray images than do thermionic emitters, independently of whether the sample is biological or nonbiological. The near-uniformity in energy distribution of electrons emitted from carbon nanotubes might be related to the improved image quality in the field-emission mode. © 2001 American Institute of Physics.


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