Electron transport properties of irradiated polyimide thin films in single track regime

Murugaraj, Pandiyan; Mainwaring, David; Siegele, Rainer
March 2009
Applied Physics Letters;3/23/2009, Vol. 94 Issue 12, p122101
Academic Journal
We have prepared a suite of polyimide thin films containing spatially separated one-dimensional conductive-nanowires by ion-beam irradiation exhibiting temperature dependent electrical resistance consistent with thermally activated electron hopping with activation energies about 1 eV arising from localized states spatially distributed along the ion tracks. Dielectric measurements showed the formation of high dielectric constant interphase regions surrounding each ion track generated during the irradiation process, responsible for space-charge accumulation which influences electron transport within the ion tracks. This behavior suggests a role for space-charge effects and dielectric properties in this interphase region in the control of electron transport within single track nanowires.


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