The magnitude and spatial distribution of the electric field surrounding individual field-emitting carbon nanotubes was determined using electron holography performed in situ inside a high resolution transmission electron microscope. It was found that the electric field and the associated field emission current was concentrated precisely at the tips of the nanotubes and not at other nanotube defects. Observations showed that the electric field magnitude and distribution were stable in time, even in cases where the nanotube field emission current exhibited extensive temporal fluctuations.
ASJC Scopus subject areas
- Physics and Astronomy(all)