title: Electron transfer properties of iodine-doped single-walled carbon nanotubes using field effect transistor.
abstract: Single-walled carbon nanotubes (SWNTs) are known to have a p-type charge transfer character in the atmosphere. The energy state of SWNTs can be modulated by doping with either an electron donor or an acceptor. In this study, iodine molecules are chosen for intercalation to SWNTs to predict the charge transfer tendency between them. Field-effect transistors (FETs) using iodine intercalated SWNTs (I-SWNTs) are fabricated and their electronic properties are investigated to better understand the charge transfer between iodine and SWNTs by changing gate voltages. Under vacuum, I-SWNT FETs exhibit weak n-type character, indicating that electrons are transferred slightly from the iodine to the SWNTs. After exposure to O2 gas, n-type characters are reduced; however, they still retain their original type.
authors.affiliation: Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, Haengdang-dong 17, Seoul 133-791, Korea.
authors.forename: Taehee
authors.initials: T
authors.lastname: Park
authors.forename: Kijo
authors.initials: K
authors.lastname: Sim
authors.forename: Jongtaek
authors.initials: J
authors.lastname: Lee
authors.forename: Whikun
authors.initials: W
authors.lastname: Yi