Composite conduction in ion-implanted polymers
- 1 January 1993
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 73 (1) , 474-476
- https://doi.org/10.1063/1.353824
Abstract
The temperature dependence of the dc conductivity for polyamide-imide films, implanted with 50 keV As ions to different fluences, has been studied. Our high-resolution data reveal a two-component conductivity that depends on both one-dimensional variable range hopping (VRH) and three-dimensional VRH. For low fluence levels (5×1015 ions/cm2), the one-dimensional VRH is dominant while at higher fluences (1×1017 ions/cm2), the three-dimensional VRH dominates. These materials become highly disordered and form hard carbon materials along the ion track. The conductivity may be explained by 1D VRH along the ion track at low fluences while at higher fluences, regions of carbon rich material form three-dimensional structures where 3D VRH exists. This rather simple model and its composite conductivity can explain the exact curvature of the temperature dependent conductivity, while single VRH models and percolation models cannot.This publication has 14 references indexed in Scilit:
- Ion implantation of new polymers containing imide and amide unitsMaterials Letters, 1991
- Ion implantation of polymers for electrical conductivity enhancementNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1991
- Improved surface properties of polymer materials by multiple ion beam treatmentJournal of Materials Research, 1991
- Conductivity enhancement of poly-ether-ether-ketone by ion implantationJournal of Applied Physics, 1990
- Structure and morphology of ion-implanted polyimide filmsNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
- Fractal nature of electrical conductivity in ion-implanted polymersPhysical Review B, 1986
- Ion implantation studies of polydiacetylene crystalsJournal of Applied Physics, 1985
- Ion Implantation of PolymersMRS Proceedings, 1983
- Large conductivity changes in ion beam irradiated organic thin filmsApplied Physics Letters, 1982
- Hopping conductivity in highly anisotropic systemsPhilosophical Magazine, 1973