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Switching behavior of plasma polymer films containing silver nanoparticles

: Kiesow, A.; Morris, J.E.; Radehaus, C.; Heilmann, A.


Journal of applied physics 94 (2003), Nr.10, S.6988-6990
ISSN: 0021-8979
ISSN: 1089-7550
Fraunhofer IWM ()
plasma polymer; silver; nanoparticle; electrical property; polymer-metal nanocomposite; metallic nanoparticle; thin film; electronic switching; percolation structure

A reversible electronic switching effect has been observed in plasma polymer films with embedded silver nanoparticles. The electrical and nanostructural properties of the films have been investigated, and three different structure types were observed: metallic, percolation, and dielectric. While for the metallic and dielectric types, respectively, metallic conduction and thermally activated tunneling can be identified as the dominant electronic conduction mechanisms, switching appears only in percolation structures. These drastic, abrupt changes of up to six orders of magnitude in the current-voltage behavior are highly reversible for these nanocomposite materials, and are defined as threshold switching.