Field emission from isolated individual vertically aligned carbon nanocones

被引：66

作者：

Baylor, LR ^{[1
]}

Merkulov, VI

Ellis, ED

Guillorn, MA

Lowndes, DH

Melechko, AV

Simpson, ML

Whealton, JH

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA

[3] Univ Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2002年 / 91卷 / 07期

关键词：

D O I：

10.1063/1.1455138

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Field emission from isolated individual vertically aligned carbon nanocones (VACNCs) has been measured using a small-diameter moveable probe. The probe was scanned parallel to the sample plane to locate the VACNCs, and perpendicular to the sample plane to measure the emission turn-on electric field of each VACNC. Individual VACNCs can be good field emitters. The emission threshold field depends on the geometric aspect ratio (height/tip radius) of the VACNC and is lowest when a sharp tip is present. VACNCs exposed to a reactive ion etch process demonstrate a lowered emission threshold field while maintaining a similar aspect ratio. Individual VACNCs can have low emission thresholds, carry high current densities, and have long emission lifetime. This makes them very promising for various field emission applications for which deterministic placement of the emitter with submicron accuracy is needed. (C) 2002 American Institute of Physics.

引用

页码：4602 / 4606

页数：5