Comparison of Field Emissions from Side Wall and Tip of an Individual Carbon Nanotube
- 1 April 2005
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 44 (4R), 1648-1651
- https://doi.org/10.1143/jjap.44.1648
Abstract
Electrons are generally emitted from the tip of a carbon nanotube (CNT) when the CNT stands on a substrate, but it is not clear where electrons are emitted when a CNT is bent or lies down on a substrate. We have investigated the field emission properties of the side wall of a multi-walled carbon nanotube (MWNT) compared with that of the tip of a MWNT. We also calculated electric field intensities at the side wall and the tip of a MWNT using the finite element method. The turn-on voltage is 150 V for the tip and 570 V for the side wall of the MWNT, which is consistent with calculations indicating that the intensity of the electric field concentrated on the tip of a CNT is 2.8 times larger than that on the side wall of a CNT shaped like a loop. This suggests that the field emission is predominantly from the tips of CNTs in a field emitter. However, the emission current from the side wall is larger than that from the tip of MWNTs.Keywords
This publication has 9 references indexed in Scilit:
- Barrier Effect on Field Emission from Stand-alone Carbon NanotubeJapanese Journal of Applied Physics, 2004
- Field emission vacuum power switch using vertically aligned carbon nanotubesJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2003
- Nanotweezers consisting of carbon nanotubes operating in an atomic force microscopeApplied Physics Letters, 2001
- Carbon Nanotube-Based Field-Emission Displays for Large-Area and Full-Color ApplicationsJapanese Journal of Applied Physics, 2000
- Optical Emission Spectroscopy of Arc Flame Plasma for Generation of Carbon NanotubesJapanese Journal of Applied Physics, 2000
- Novel Process for Fabricating Nanodevices Consisting of Carbon NanotubesJapanese Journal of Applied Physics, 1999
- Fully sealed, high-brightness carbon-nanotube field-emission displayApplied Physics Letters, 1999
- Carbon-nanotube tips for scanning probe microscopy: Preparation by a controlled process and observation of deoxyribonucleic acidApplied Physics Letters, 1999
- Cathode Ray Tube Lighting Elements with Carbon Nanotube Field EmittersJapanese Journal of Applied Physics, 1998