|
KMID : 1102020160460040244
|
|
Applied Microscopy
2016 Volume.46 No. 4 p.244 ~ p.252
|
|
|
Switch-on Phenomena and Field Emission from Multi-Walled Carbon Nanotubes Embedded in Glass
|
|
Ali Emad S Bani
Mousa Marwan S.
|
|
|
Abstract
|
|
|
|
This paper describes a new design of carbon nanotube tip. Nanocly™ NC 7000 Thin Multiwall Carbon Nanotubes of carbon purity (90%) and average diameter tube 9.5 nm with a high aspect-ratio (>150) were used. These tips were manufactured by employing a drawing technique using a glass puller. The glass microemitters with internal carbon nanotubes show a switch-on effect to a high current level (1 to 20 μA). A field electron microscope with a tip (cathode)?screen (anode) separation at ~10 mm was used to characterize the electron emitters. The system was evacuated down to a base pressure of ~10?9 mbar when baked at up to ~200°C overnight. This allowed measurements of typical Field Electron Emission characteristics; namely the current?voltage (I-V) characteristics and the emission images on a conductive phosphorus screen (the anode). Fowler-Nordheim plots of the current-voltage characteristics show current switch-on for each of these emitters.
|
|
|
KEYWORD
|
|
|
Carbon nanotubes, Cold field electron emission, Field electron microscope, Fowler-Nordheim plots, Glass microemitters
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|