Abstract
A new configuration of carbon nanotubes (CNTs), whose surfaces are fully covered with nanosized node-like structures, has been observed. The node structures have almost the same size (40–50 nm). We named this material nodose carbon nanotubes (NCNTs). Field emission scanning electron microscope shows that common CNTs are changed to NCNTs after hydrogen plasma surface treatment in our homemade plasma equipment. Experiments verified that this material has good field emission characteristics, low threshold field of 1.12 V/μm, emitting current density of 1.72 mA/cm 2 at a field of 10.4 V/μm and very high emission site density of about 10 6/cm 2, which is three orders of magnitude higher than that from common CNT films. These results indicate that the CNTs with nodose structure are a very good field emitter material.
Published Version
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