Dielectric performance of polymer-based composites containing core-shell Ag@TiO2 nanoparticle fillers

This paper reports composites prepared by embedding core-shell Ag@TiO2 fillers into polytetrafluoroethylene. Ag nanoparticles were homogeneously coated with TiO2, to give a shell thickness of approximately ∼8–10 nm. The composite containing Ag@TiO2 nanoparticles with rutile shells exhibited better d...

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Veröffentlicht in:Applied physics letters 2016-02, Vol.108 (7)
Hauptverfasser: Liang, Fei, Zhang, Lu, Lu, Wen-Zhong, Wan, Qian-Xing, Fan, Gui-Fen
Format: Artikel
Sprache:eng
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Zusammenfassung:This paper reports composites prepared by embedding core-shell Ag@TiO2 fillers into polytetrafluoroethylene. Ag nanoparticles were homogeneously coated with TiO2, to give a shell thickness of approximately ∼8–10 nm. The composite containing Ag@TiO2 nanoparticles with rutile shells exhibited better dielectric properties than the composite containing Ag@TiO2 nanoparticles with anatase shells. The relative permittivity (εr) of the composite containing 70 vol. % filler was approximately 240 at 100 Hz, which was more than 100 times higher than that of pure polytetrafluoroethylene (εr = 2.1). An effective medium percolation theory model is used to account for the dielectric constant of the composite.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4942096