抄録
Exfoliated carbon fibers were reported to be prepared by rapid heating up to 1000 oC of the intercalation compounds of carbon fibers. After exfoliation, carbon fibers were found to be converted to a bundle of thin filaments split along the original fiber axis. After exfoliation, each of filaments consisted of well-aligned carbon layers along the filament axis. The field emission characteristics were measured on these exfoliated carbon fibers. Its current-emission characteristics were determined on the exfoliation carbon fibers fixed on the tungsten hairpin, using the current up to 1000 mA with the applied voltage of 2 kV. The current-emission characteristics obtained on exfoliated carbon fibers were much better than those reported on multi-wall carbon nanotubes. The interesting and unique morphology of exfoliated fibers, carbon layers being edged on the cross section of filaments, derived the electric field concentration and, as a consequence, high current even at low voltage.
