title: Millimeter-long carbon nanotubes: outstanding electron-emitting sources.
abstract: We are reporting the fabrication of a very efficient electron source using millimeter-long and highly crystalline carbon nanotubes. These devices start to emit electrons at fields as low as 0.17 V/μm and reach threshold emission at 0.24 V/μm. In addition, these electron sources are very stable and can achieve a peak current density of 750 mA cm(-2) at only 0.45 V/μm. In order to demonstrate intense electron beam generation, these devices were used to produce visible light by cathodoluminescence. Finally, density functional theory calculations were used to rationalize the measured electronic field emission properties in open carbon nanotubes of different lengths. The modeling establishes a clear correlation between length and field enhancement factor.
authors: Department of Physics, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802-6300, United States.
authors: Néstor
authors: N
authors: Perea-López
authors: Bernabé
authors: B
authors: Rebollo-Plata
authors: Juan Antonio
authors: JA
authors: Briones-León
authors: Aarón
authors: A
authors: Morelos-Gómez
authors: Daniel
authors: D
authors: Hernández-Cruz
authors: Gustavo A
authors: GA
authors: Hirata
authors: Vincent
authors: V
authors: Meunier
authors: Andrés R
authors: AR
authors: Botello-Méndez
authors: Jean-Christophe
authors: JC
authors: Charlier
authors: Benji
authors: B
authors: Maruyama
authors: Emilio
authors: E
authors: Muñoz-Sandoval
authors: Florentino
authors: F
authors: López-Urías
authors: Mauricio
authors: M
authors: Terrones
authors: Humberto
authors: H
authors: Terrones