Abstract
Carbon nanotubes (CNTs) with supreme field emission properties were synthesized by depositing Co-containing amorphous carbon (a-C:Co) composite films using filtered cathodic vacuum arc technique with a 15 at % Co-containing graphite target and subsequently growing CNTs using biased thermal chemical vapor deposition at 580 °C with the a-C:Co composite film as a catalyst layer. The as-grown CNTs with a thin diameter of about 10 nm have a low threshold field of 1.6 Vμm and a stable current density of 2.1 mA cm2 at 3 Vμm. Thus an x-ray source was built in a diode configuration using the CNTs as its cold electron source showing good potential in x-ray radiography.
Original language | English |
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Article number | 123115 |
Pages (from-to) | 1-3 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 86 |
Issue number | 12 |
DOIs | |
Publication status | Published - 21 Mar 2005 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)