title: Memory effect in an ionic liquid matrix containing single-walled carbon nanotubes and polystyrene.
abstract: We report the use of an ionic liquid (IL) gel matrix containing a blend of single-walled carbon nanotubes (SWNTs) and polystyrene (PS) as a memory device. SWNTs and PS beads were mixed in a room-temperature IL, 1-butyl-3-methyl-hexafluorophosphate ([BMIM][PF(6)]). The composite gel was sandwiched between a bottom ITO glass and a top aluminium electrode. By merely changing the concentrations of SWNTs in the inert insulating PS matrix, we observed several distinct electrical properties of the device, such as an insulator, a memory in terms of switching and negative differential resistance (NDR), and a conductor. The electric bistable switching hops between a higher impedance (OFF) state and a lower impedance (ON) state which is approximately equal to five orders of current decays.
authors.affiliation: Process Chemistry Centre, c/o Laboratory of Analytical Chemistry, Åbo Akademi University, Biskopsgatan 8, FIN-20500 Åbo/Turku, Finland. Centre of Advanced Photonics and Electronics, Department of Engineering, University of Cambridge, 9 J J Thomson Avenue, Cambridge CB3 0FA, UK.
authors.forename: Di
authors.initials: D
authors.lastname: Wei
authors.forename: Jayanta K
authors.initials: JK
authors.lastname: Baral
authors.forename: Ronald
authors.initials: R
authors.lastname: Osterbacka
authors.forename: Ari
authors.initials: A
authors.lastname: Ivaska