Angular distribution of field emitted electrons from vertically aligned carbon nanotube arrays

Mohamed M El Gomati, S. Iacobucci, M. Fratini, A. Rizzo, F. Scarinci, Y. Zhang, M. Mann, C. Li, W. I. Milne, S. Lagomarsino, G. Stefani

Research output: Contribution to journalArticlepeer-review

Abstract

Angular field emission (FE) properties of vertically aligned carbon nanotube arrays have been measured on samples grown by plasma enhanced chemical vapor deposition and characterized by scanning electron microscope and I-V measurements. These properties determine the angular divergence of electron beams, a crucial parameter in order to obtain high brilliance FE based cathodes. From angular distributions of the electron beam transmitted through extraction grids of different mesh size and by using ray-tracing simulations, the maximum emission angle from carbon nanotube tips has been determined to be about ± 30° around the tube main axis.
Original languageEnglish
Pages (from-to)053116
JournalApplied Physics Letters
Volume100
Early online date2 Feb 2012
DOIs
Publication statusPublished - 2 Feb 2012

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