Carbon-nanotube-polymer nanocomposites for field-emission cathodes.
The electron field-emission (FE) characteristics of functionalized single-walled carbon-nanotube (CNT)-polymer composites produced by solution processing are reported. It is shown that excellent electron emission can be obtained by using as little as 0.7% volume fraction of nanotubes in the composite. Furthermore by tailoring the nanotube concentration and type of polymer, improvements in the charge transfer through the composite can be obtained. The synthesis of well-dispersed randomly oriented nanotube-polymer composites by solution processing allows the development of CNT-based large area cathodes produced using a scalable technology. The relative insensitivity of the cathode's FE characteristics to the electrical conductivity of the composite is also discussed.
Connolly
Thomas
T
Advanced Technology Institute, University of Surrey, Guildford GU2 7XH, UK.
Smith
Richard C
RC
Hernandez
Yenny
Y
Gun'ko
Yurii
Y
Coleman
Jonathan N
JN
Carey
J David
JD
D004566:Electrodes; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013499:Surface Properties
D037742:Nanotubes, Carbon