Field Effect of Carbon Nanotubes with an Ionomeric Polymer
Igor A. Levitsky, Igor G. Kolobov, William B. Euler, Phys. Stat. Solidi B, accepted 2007,
Abstract
Flexible field effect transisitors based on a single walled carbon nanotube (SWNT) network and an ionomeric polymer (nafion) were obtained by spraying nanotubes onto the polymer film. The threshold gate voltage was extremely low, ~1 V, which was surprising since the nafion layer was so thick, ~180 
m. This was attributed to the electrolytic nature of nafion, which results in the existence of a screening layer at the polymer-nanotube interface. FET hysteresis can be rationalized in terms of charge redistribution induced by mobile protons inside nafion clusters in proximity to the nanotube surface.