Field Effect of Carbon Nanotubes With an Ionomeric Polymer
Igor A. Levitsky, Igor G. Kolobov, William B. Euler, Physica Status Solidi (B), 2007, 244, 2666 – 2672
Abstract
Flexible field effect transistors 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 was so thick, ~180 μm. 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.