Field Electron Emission of MWCNTs/PEO composites

摘要

Electron field emission properties of multi-walled carbon nanotubes (MWCNTs)/polyethylene oxide (PEO) thin films composites with (5%, 15%, 25%, 33%, 40% and 50 % loading of MWCNTs) were investigated. J-E curved were measured and modeled according to Fowler-Nordheim theory. Sample with 33% MWCNTs loading showed the best results with the turn on and threshold fields of 7.66 V/μm and 9.72 V/um respectively. With 15% MWCNTs loading, the highest enhancement factor of 1509 was observed. Excellent current stability, for the duration of about 34 min was observed for all samples. Raman spectroscopy analysis showed a good matrix/filler interaction and thermogravimetric analysis indicated that thermal degradation of the composites occurred in two stages.