Publication Details (including relevant citation information):
Archana Pandey, Abhishek Prasad, Jason Moscatello and Yoke Khin Yap.
ACS Nano, Available Online October 18, 2010
We have created PMMA−CNT matrices by embedding opened-tip vertically aligned multiwalled carbon nanotubes (VA-MWCNTs) with poly(methyl methacrylate) (PMMA). These PMMA−CNT matrices are excellent electron field emitters with an emission threshold field of 1.675 V/μm, more than 2-fold lower than that of the as-grown sample. In addition, the emission site density from these matrices is high, nearly filling up the entire sample surface. Emission stability tests at 1.35 mA/cm2 were performed continuously for 40 h with no significant degradation. On the basis of our theoretical simulation and hypothetical modeling, we attribute these performances to the reduced screening effect and lower Joule heating due to the shorter effective transport distance of the electrons in the MWCNTs.
Address (URL): http://pubs.acs.org/doi/abs/10.1021/nn100925g